National Pokédex #0812 · Generation 8

Rillaboom

By drumming, it taps into the power of its special tree stump. The roots of the stump follow its direction in battle.

Natural spawnRaid den

Quick answer

How do you get Rillaboom?

Rillaboom can spawn in Bamboo Jungle, Jungle, Sparse Jungle, and 7 other eligible biomes (Search: On land; Sky light: Bright; Ground: Natural / Trees). It appears in tier 5 raids. Check the complete conditions below; these routes reflect AshRun's installed ATMons files.

AshRun ATMons 1.3.0 · Checked 2026-10-16 · Sources & limitations

AshRun locations

How to obtain Rillaboom

1 place to look

Where to look in the wild

Choose one location below and meet its conditions together. Separate cards are alternative routes. A rarity label describes a spawn pool, not the chance of finding one on each attempt.

Eligible biomes (10)

Bamboo Jungle + 9 more

Expanded from server categories: Jungle, Tropical Island

Level35-53RarityUltra-Rare

Search: On land
Sky light: Bright
Ground: Natural / Trees

Excluded when this matches: Ground: Farmland.

Raid den

Tier 5 · Grass

Relative boss weight 20. Defined moves: Wood Hammer, Slam, Knock Off, Drum Beating.

Compare raid tiers and encounters →

Before you throw a ball

Catching Rillaboom

If you encounter a wild Rillaboom, an ordinary throw outside battle requires your first non-fainted party Pokémon to be at least its level.

Party order matters: the game checks the first conscious Pokémon, not the highest level anywhere in your team.
With no conscious party Pokémon, this outside-battle rule allows only targets up to level 15.
A guaranteed-catch ball bypasses this ordinary level check. You can also battle a wild target and use a ball during your turn.

These rules describe wild encounters. Raids and scripted encounters may use their own capture flow. Read the catching guide and blocked-throw checklist · Checked 2026-10-16.

Base catch-rate value: 45. This is a species value, not a percentage or a promise that a particular ball will work.

Battle profile

Base stats

530 total

Type weaknesses & resistances

Damage taken by Rillaboom with Grass typing:

Weak to: Bug 2×Fire 2×Flying 2×Ice 2×Poison 2×
Resists: Electric 0.5×Grass 0.5×Ground 0.5×Water 0.5×
Immune to: None by typing alone

Unlisted move types deal normal (1×) damage. Both types are combined. Abilities, held items, moves, weather, Terastallization and form changes can alter the result.

Base stat values

Hp100

Attack125

Defence90

Special Attack60

Special Defence70

Speed85

Abilities

Overgrow
Grassy Surge Hidden

Training

Base experience: 265
Growth: Medium Slow
EV yield: Hp: 0 · Attack: 3 · Defence: 0 · Special Attack: 0 · Special Defence: 0 · Speed: 0
Friendship: 50

Progression

Evolution & forms

Follow the requirements on each arrow, then open the next Pokémon to continue the chain. Regional and alternate forms can use different rules. Compare all evolution methods.

Evolves from

Thwackey

level it up; reach level 35

Find Thwackey →

No further evolution is listed for this Pokémon or its recorded forms.

Forms

These are recorded forms, including transformations. A form appearing here does not by itself mean it spawns in the wild. Check the form labels on locations and evolution paths.

Gmax form

grass

Overgrow, Grassy Surge

View form details →

Gmax form — types, stats and evolution

grass

Damage taken by Rillaboom (Gmax) with Grass typing:

Weak to: Bug 2×Fire 2×Flying 2×Ice 2×Poison 2×
Resists: Electric 0.5×Grass 0.5×Ground 0.5×Water 0.5×
Immune to: None by typing alone

Unlisted move types deal normal (1×) damage. Both types are combined. Abilities, held items, moves, weather, Terastallization and form changes can alter the result.

Abilities: Overgrow, Grassy Surge (hidden).

Hp: 100
Attack: 125
Defence: 90
Special Attack: 60
Special Defence: 70
Speed: 85

No further evolution is recorded for this form.

Complete installed learnset

Moves

121 entries

Level moves (16)

Lv. 1 · Drum BeatingLv. 1 · Double HitLv. 1 · Grassy TerrainLv. 1 · Noble RoarLv. 1 · ScratchLv. 1 · GrowlLv. 1 · Branch PokeLv. 1 · TauntLv. 12 · Razor LeafLv. 19 · ScreechLv. 24 · Knock OffLv. 30 · SlamLv. 38 · UproarLv. 46 · Wood HammerLv. 54 · EndeavorLv. 62 · Boomburst

Egg moves (6)

Fake OutGrowthHammer ArmLeech SeedStrengthWorry Seed

Tm moves (67)

AcrobaticsAssuranceBody PressBody SlamBrick BreakBrutal SwingBulk UpBulldozeBullet SeedDarkest LariatDouble-EdgeDrain PunchEarth PowerEarthquakeEndeavorEndureEnergy BallFacadeFalse SwipeFlingFocus BlastFocus EnergyFocus PunchFrenzy PlantGiga DrainGiga ImpactGrass KnotGrass PledgeGrassy GlideGrassy TerrainHigh HorsepowerHyper BeamHyper VoiceKnock OffLeaf StormLow KickLow SweepMagical LeafMega KickMega PunchMud ShotNature PowerProtectRestScary FaceScreechSeed BombSleep TalkSnarlSolar BeamSolar BladeStomping TantrumStrengthSubstituteSunny DaySuperpowerSwiftSwords DanceTake DownTauntTera BlastThiefTrailblazeUproarU-turnWork UpWorry Seed

Tutor moves (29)

Bulk UpBulldozeDrain PunchEarth PowerEndeavorEnergy BallFalse SwipeFocus EnergyFocus PunchFrenzy PlantGiga DrainGiga ImpactGrass PledgeGrassy GlideHigh HorsepowerHyper BeamHyper VoiceKnock OffLow KickMagical LeafRestSeed BombSleep TalkSnarlStomping TantrumSuperpowerSwiftUproarWorry Seed

Legacy moves (3)

AttractRoundSnore

Useful extras

Drops & breeding

Stick

Quantity 1-2

Miracle Seed

25% chance

Egg groups: Field, Grass
Egg cycles: 20
Maximum drops: 3

Technical server dataRaw records, internal IDs, source files, presets, and full JSON

Source summary

Base species: Cobblemon-neoforge-1.7.3+1.21.1.jar. Installed additions: none.

Acquisition records

{
  "questGuides": [],
  "structureEncounters": [],
  "naturalSpawns": [
    {
      "id": "rillaboom-1",
      "pokemon": "rillaboom",
      "presets": [
        "natural",
        "treetop"
      ],
      "type": "pokemon",
      "spawnablePositionType": "grounded",
      "bucket": "ultra-rare",
      "level": "35-53",
      "weight": 0.4,
      "condition": {
        "minSkyLight": 8,
        "maxSkyLight": 15,
        "biomes": [
          "#cobblemon:is_jungle",
          "#cobblemon:is_tropical_island"
        ]
      },
      "source": "Cobblemon-neoforge-1.7.3+1.21.1.jar",
      "sourceFile": "data/cobblemon/spawn_pool_world/0812_rillaboom.json",
      "formProperties": [],
      "presetConditions": [
        {
          "preset": "natural",
          "condition": {
            "neededBaseBlocks": [
              "#cobblemon:natural"
            ]
          }
        },
        {
          "preset": "treetop",
          "condition": {
            "neededBaseBlocks": [
              "#cobblemon:trees"
            ]
          }
        }
      ],
      "presetAntiConditions": [
        {
          "preset": "natural",
          "condition": {
            "neededBaseBlocks": [
              "minecraft:farmland"
            ]
          }
        }
      ],
      "presetProvenance": [
        {
          "preset": "natural",
          "source": "Cobblemon-neoforge-1.7.3+1.21.1.jar",
          "sourceFile": "data/cobblemon/spawn_detail_presets/natural.json"
        },
        {
          "preset": "treetop",
          "source": "Cobblemon-neoforge-1.7.3+1.21.1.jar",
          "sourceFile": "data/cobblemon/spawn_detail_presets/treetop.json"
        }
      ],
      "effectiveCondition": {
        "minSkyLight": 8,
        "maxSkyLight": 15,
        "biomes": [
          "#cobblemon:is_jungle",
          "#cobblemon:is_tropical_island"
        ],
        "neededBaseBlocks": [
          "#cobblemon:natural",
          "#cobblemon:trees"
        ]
      },
      "effectiveAnticonditions": [
        {
          "neededBaseBlocks": [
            "minecraft:farmland"
          ]
        }
      ],
      "resolvedBiomes": [
        "minecraft:bamboo_jungle",
        "minecraft:jungle",
        "minecraft:sparse_jungle",
        "ars_elemental:flourishing_forest",
        "terralith:amethyst_canyon",
        "terralith:amethyst_rainforest",
        "terralith:jungle_mountains",
        "terralith:rocky_jungle",
        "terralith:tropical_jungle",
        "terralith:cave/underground_jungle"
      ],
      "resolvedExcludedBiomes": []
    }
  ],
  "raids": [
    {
      "tier": "FIVE",
      "type": "grass",
      "weight": 20,
      "moves": [
        "woodhammer",
        "slam",
        "knockoff",
        "drumbeating"
      ],
      "source": "cobblemonraiddens-neoforge-0.11.7+1.21.1.jar",
      "sourceFile": "data/cobblemonraiddens/raid/boss/rillaboom.json",
      "formProperties": [],
      "gender": null,
      "ability": null,
      "bossProperties": []
    }
  ],
  "fossils": []
}

Evolution and forms

{
  "evolutions": [],
  "forms": [
    {
      "name": "Gmax",
      "aspects": [
        "gmax"
      ],
      "types": [
        "grass"
      ],
      "abilities": [
        "overgrow",
        "h:grassysurge"
      ],
      "stats": {
        "hp": 100,
        "attack": 125,
        "defence": 90,
        "special_attack": 60,
        "special_defence": 70,
        "speed": 85
      },
      "moves": [
        {
          "method": "level",
          "move": "drumbeating",
          "level": 1
        },
        {
          "method": "level",
          "move": "doublehit",
          "level": 1
        },
        {
          "method": "level",
          "move": "grassyterrain",
          "level": 1
        },
        {
          "method": "level",
          "move": "nobleroar",
          "level": 1
        },
        {
          "method": "level",
          "move": "scratch",
          "level": 1
        },
        {
          "method": "level",
          "move": "growl",
          "level": 1
        },
        {
          "method": "level",
          "move": "branchpoke",
          "level": 1
        },
        {
          "method": "level",
          "move": "taunt",
          "level": 1
        },
        {
          "method": "level",
          "move": "razorleaf",
          "level": 12
        },
        {
          "method": "level",
          "move": "screech",
          "level": 19
        },
        {
          "method": "level",
          "move": "knockoff",
          "level": 24
        },
        {
          "method": "level",
          "move": "slam",
          "level": 30
        },
        {
          "method": "level",
          "move": "uproar",
          "level": 38
        },
        {
          "method": "level",
          "move": "woodhammer",
          "level": 46
        },
        {
          "method": "level",
          "move": "endeavor",
          "level": 54
        },
        {
          "method": "level",
          "move": "boomburst",
          "level": 62
        },
        {
          "method": "egg",
          "move": "fakeout"
        },
        {
          "method": "egg",
          "move": "growth"
        },
        {
          "method": "egg",
          "move": "hammerarm"
        },
        {
          "method": "egg",
          "move": "leechseed"
        },
        {
          "method": "egg",
          "move": "strength"
        },
        {
          "method": "egg",
          "move": "worryseed"
        },
        {
          "method": "tm",
          "move": "acrobatics"
        },
        {
          "method": "tm",
          "move": "assurance"
        },
        {
          "method": "tm",
          "move": "bodypress"
        },
        {
          "method": "tm",
          "move": "bodyslam"
        },
        {
          "method": "tm",
          "move": "brickbreak"
        },
        {
          "method": "tm",
          "move": "brutalswing"
        },
        {
          "method": "tm",
          "move": "bulkup"
        },
        {
          "method": "tm",
          "move": "bulldoze"
        },
        {
          "method": "tm",
          "move": "bulletseed"
        },
        {
          "method": "tm",
          "move": "darkestlariat"
        },
        {
          "method": "tm",
          "move": "doubleedge"
        },
        {
          "method": "tm",
          "move": "drainpunch"
        },
        {
          "method": "tm",
          "move": "earthpower"
        },
        {
          "method": "tm",
          "move": "earthquake"
        },
        {
          "method": "tm",
          "move": "endeavor"
        },
        {
          "method": "tm",
          "move": "endure"
        },
        {
          "method": "tm",
          "move": "energyball"
        },
        {
          "method": "tm",
          "move": "facade"
        },
        {
          "method": "tm",
          "move": "falseswipe"
        },
        {
          "method": "tm",
          "move": "fling"
        },
        {
          "method": "tm",
          "move": "focusblast"
        },
        {
          "method": "tm",
          "move": "focusenergy"
        },
        {
          "method": "tm",
          "move": "focuspunch"
        },
        {
          "method": "tm",
          "move": "frenzyplant"
        },
        {
          "method": "tm",
          "move": "gigadrain"
        },
        {
          "method": "tm",
          "move": "gigaimpact"
        },
        {
          "method": "tm",
          "move": "grassknot"
        },
        {
          "method": "tm",
          "move": "grasspledge"
        },
        {
          "method": "tm",
          "move": "grassyglide"
        },
        {
          "method": "tm",
          "move": "grassyterrain"
        },
        {
          "method": "tm",
          "move": "highhorsepower"
        },
        {
          "method": "tm",
          "move": "hyperbeam"
        },
        {
          "method": "tm",
          "move": "hypervoice"
        },
        {
          "method": "tm",
          "move": "knockoff"
        },
        {
          "method": "tm",
          "move": "leafstorm"
        },
        {
          "method": "tm",
          "move": "lowkick"
        },
        {
          "method": "tm",
          "move": "lowsweep"
        },
        {
          "method": "tm",
          "move": "magicalleaf"
        },
        {
          "method": "tm",
          "move": "megakick"
        },
        {
          "method": "tm",
          "move": "megapunch"
        },
        {
          "method": "tm",
          "move": "mudshot"
        },
        {
          "method": "tm",
          "move": "naturepower"
        },
        {
          "method": "tm",
          "move": "protect"
        },
        {
          "method": "tm",
          "move": "rest"
        },
        {
          "method": "tm",
          "move": "scaryface"
        },
        {
          "method": "tm",
          "move": "screech"
        },
        {
          "method": "tm",
          "move": "seedbomb"
        },
        {
          "method": "tm",
          "move": "sleeptalk"
        },
        {
          "method": "tm",
          "move": "snarl"
        },
        {
          "method": "tm",
          "move": "solarbeam"
        },
        {
          "method": "tm",
          "move": "solarblade"
        },
        {
          "method": "tm",
          "move": "stompingtantrum"
        },
        {
          "method": "tm",
          "move": "strength"
        },
        {
          "method": "tm",
          "move": "substitute"
        },
        {
          "method": "tm",
          "move": "sunnyday"
        },
        {
          "method": "tm",
          "move": "superpower"
        },
        {
          "method": "tm",
          "move": "swift"
        },
        {
          "method": "tm",
          "move": "swordsdance"
        },
        {
          "method": "tm",
          "move": "takedown"
        },
        {
          "method": "tm",
          "move": "taunt"
        },
        {
          "method": "tm",
          "move": "terablast"
        },
        {
          "method": "tm",
          "move": "thief"
        },
        {
          "method": "tm",
          "move": "trailblaze"
        },
        {
          "method": "tm",
          "move": "uproar"
        },
        {
          "method": "tm",
          "move": "uturn"
        },
        {
          "method": "tm",
          "move": "workup"
        },
        {
          "method": "tm",
          "move": "worryseed"
        },
        {
          "method": "tutor",
          "move": "bulkup"
        },
        {
          "method": "tutor",
          "move": "bulldoze"
        },
        {
          "method": "tutor",
          "move": "drainpunch"
        },
        {
          "method": "tutor",
          "move": "earthpower"
        },
        {
          "method": "tutor",
          "move": "endeavor"
        },
        {
          "method": "tutor",
          "move": "energyball"
        },
        {
          "method": "tutor",
          "move": "falseswipe"
        },
        {
          "method": "tutor",
          "move": "focusenergy"
        },
        {
          "method": "tutor",
          "move": "focuspunch"
        },
        {
          "method": "tutor",
          "move": "frenzyplant"
        },
        {
          "method": "tutor",
          "move": "gigadrain"
        },
        {
          "method": "tutor",
          "move": "gigaimpact"
        },
        {
          "method": "tutor",
          "move": "grasspledge"
        },
        {
          "method": "tutor",
          "move": "grassyglide"
        },
        {
          "method": "tutor",
          "move": "highhorsepower"
        },
        {
          "method": "tutor",
          "move": "hyperbeam"
        },
        {
          "method": "tutor",
          "move": "hypervoice"
        },
        {
          "method": "tutor",
          "move": "knockoff"
        },
        {
          "method": "tutor",
          "move": "lowkick"
        },
        {
          "method": "tutor",
          "move": "magicalleaf"
        },
        {
          "method": "tutor",
          "move": "rest"
        },
        {
          "method": "tutor",
          "move": "seedbomb"
        },
        {
          "method": "tutor",
          "move": "sleeptalk"
        },
        {
          "method": "tutor",
          "move": "snarl"
        },
        {
          "method": "tutor",
          "move": "stompingtantrum"
        },
        {
          "method": "tutor",
          "move": "superpower"
        },
        {
          "method": "tutor",
          "move": "swift"
        },
        {
          "method": "tutor",
          "move": "uproar"
        },
        {
          "method": "tutor",
          "move": "worryseed"
        },
        {
          "method": "legacy",
          "move": "attract"
        },
        {
          "method": "legacy",
          "move": "round"
        },
        {
          "method": "legacy",
          "move": "snore"
        }
      ],
      "evolutions": [],
      "description": [
        "Gigantamax energy has caused Rillaboom's stump to grow into a drum set that resembles a forest."
      ]
    }
  ]
}

Behavior and drops

{
  "behaviour": {
    "herd": {
      "maxSize": "7",
      "toleratedLeaders": [
        {
          "pokemon": "rillaboom",
          "tier": 1
        }
      ]
    },
    "moving": {
      "swim": {
        "avoidsWater": true
      }
    },
    "combat": {
      "willDefendSelf": true,
      "willDefendOwner": true,
      "willFlee": false
    },
    "resting": {
      "drowsyChance": 0.0333,
      "rouseChance": 0.0042
    }
  },
  "drops": {
    "amount": 3,
    "entries": [
      {
        "item": "minecraft:stick",
        "quantityRange": "1-2"
      },
      {
        "item": "cobblemon:miracle_seed",
        "percentage": 25
      }
    ]
  },
  "labels": [
    "gen8"
  ]
}

Complete installed species record

{
  "implemented": true,
  "nationalPokedexNumber": 812,
  "name": "Rillaboom",
  "primaryType": "grass",
  "maleRatio": 0.875,
  "height": 21,
  "weight": 900,
  "pokedex": [
    "cobblemon.species.rillaboom.desc"
  ],
  "labels": [
    "gen8"
  ],
  "aspects": [],
  "abilities": [
    "overgrow",
    "h:grassysurge"
  ],
  "eggGroups": [
    "field",
    "grass"
  ],
  "baseStats": {
    "hp": 100,
    "attack": 125,
    "defence": 90,
    "special_attack": 60,
    "special_defence": 70,
    "speed": 85
  },
  "evYield": {
    "hp": 0,
    "attack": 3,
    "defence": 0,
    "special_attack": 0,
    "special_defence": 0,
    "speed": 0
  },
  "baseExperienceYield": 265,
  "experienceGroup": "medium_slow",
  "catchRate": 45,
  "eggCycles": 20,
  "baseFriendship": 50,
  "baseScale": 0.95,
  "hitbox": {
    "width": 1.6,
    "height": 2.3,
    "fixed": false
  },
  "drops": {
    "amount": 3,
    "entries": [
      {
        "item": "minecraft:stick",
        "quantityRange": "1-2"
      },
      {
        "item": "cobblemon:miracle_seed",
        "percentage": 25
      }
    ]
  },
  "moves": [
    "1:drumbeating",
    "1:doublehit",
    "1:grassyterrain",
    "1:nobleroar",
    "1:scratch",
    "1:growl",
    "1:branchpoke",
    "1:taunt",
    "12:razorleaf",
    "19:screech",
    "24:knockoff",
    "30:slam",
    "38:uproar",
    "46:woodhammer",
    "54:endeavor",
    "62:boomburst",
    "egg:fakeout",
    "egg:growth",
    "egg:hammerarm",
    "egg:leechseed",
    "egg:strength",
    "egg:worryseed",
    "tm:acrobatics",
    "tm:assurance",
    "tm:bodypress",
    "tm:bodyslam",
    "tm:brickbreak",
    "tm:brutalswing",
    "tm:bulkup",
    "tm:bulldoze",
    "tm:bulletseed",
    "tm:darkestlariat",
    "tm:doubleedge",
    "tm:drainpunch",
    "tm:earthpower",
    "tm:earthquake",
    "tm:endeavor",
    "tm:endure",
    "tm:energyball",
    "tm:facade",
    "tm:falseswipe",
    "tm:fling",
    "tm:focusblast",
    "tm:focusenergy",
    "tm:focuspunch",
    "tm:frenzyplant",
    "tm:gigadrain",
    "tm:gigaimpact",
    "tm:grassknot",
    "tm:grasspledge",
    "tm:grassyglide",
    "tm:grassyterrain",
    "tm:highhorsepower",
    "tm:hyperbeam",
    "tm:hypervoice",
    "tm:knockoff",
    "tm:leafstorm",
    "tm:lowkick",
    "tm:lowsweep",
    "tm:magicalleaf",
    "tm:megakick",
    "tm:megapunch",
    "tm:mudshot",
    "tm:naturepower",
    "tm:protect",
    "tm:rest",
    "tm:scaryface",
    "tm:screech",
    "tm:seedbomb",
    "tm:sleeptalk",
    "tm:snarl",
    "tm:solarbeam",
    "tm:solarblade",
    "tm:stompingtantrum",
    "tm:strength",
    "tm:substitute",
    "tm:sunnyday",
    "tm:superpower",
    "tm:swift",
    "tm:swordsdance",
    "tm:takedown",
    "tm:taunt",
    "tm:terablast",
    "tm:thief",
    "tm:trailblaze",
    "tm:uproar",
    "tm:uturn",
    "tm:workup",
    "tm:worryseed",
    "tutor:bulkup",
    "tutor:bulldoze",
    "tutor:drainpunch",
    "tutor:earthpower",
    "tutor:endeavor",
    "tutor:energyball",
    "tutor:falseswipe",
    "tutor:focusenergy",
    "tutor:focuspunch",
    "tutor:frenzyplant",
    "tutor:gigadrain",
    "tutor:gigaimpact",
    "tutor:grasspledge",
    "tutor:grassyglide",
    "tutor:highhorsepower",
    "tutor:hyperbeam",
    "tutor:hypervoice",
    "tutor:knockoff",
    "tutor:lowkick",
    "tutor:magicalleaf",
    "tutor:rest",
    "tutor:seedbomb",
    "tutor:sleeptalk",
    "tutor:snarl",
    "tutor:stompingtantrum",
    "tutor:superpower",
    "tutor:swift",
    "tutor:uproar",
    "tutor:worryseed",
    "legacy:attract",
    "legacy:round",
    "legacy:snore"
  ],
  "preEvolution": "thwackey",
  "evolutions": [],
  "forms": [
    {
      "name": "Gmax",
      "primaryType": "grass",
      "maleRatio": 0.875,
      "height": 280,
      "weight": 0,
      "pokedex": [
        "cobblemon.species.rillaboom-gmax.desc"
      ],
      "labels": [
        "gen8",
        "gmax"
      ],
      "aspects": [
        "gmax"
      ],
      "dynamaxBlocked": true,
      "evolutions": [],
      "battleOnly": true
    }
  ],
  "behaviour": {
    "herd": {
      "maxSize": "7",
      "toleratedLeaders": [
        {
          "pokemon": "rillaboom",
          "tier": 1
        }
      ]
    },
    "moving": {
      "swim": {
        "avoidsWater": true
      }
    },
    "combat": {
      "willDefendSelf": true,
      "willDefendOwner": true,
      "willFlee": false
    },
    "resting": {
      "drowsyChance": 0.0333,
      "rouseChance": 0.0042
    }
  }
}