Overview
Caterpillar (小草虫) is a hidden rare spirit in Roco Kingdom: World. It triggers at the same Holy Feather Altar statue as Stone Stone, but requires a water-type throw rather than a ground-type throw.
How to Obtain
Teleport to the Holy Feather Altar Magic Source in Old Airship Route.
Approach the statue.
Throw a water-type spirit at the statue. Caterpillar spawns around the statue.
Capture with any Gulu Ball.
Base Stat Line
The figures below are the values carried in the game's own spirit encyclopedia data for 小草虫. The six stats sum to a species total of 323.
Stat | Base value |
|---|---|
HP (生命) | 73 |
Physical Attack (物攻) | 40 |
Physical Defence (物防) | 50 |
Magic Attack (魔攻) | 43 |
Magic Defence (魔防) | 57 |
Speed (速度) | 60 |
Total | 323 |
Encyclopedia Entry
Field | Value |
|---|---|
Dex number | NO.099 |
Chinese name | 小草虫 |
Element type | Bug / Grass (虫系・草系) |
Evolution stage | Stage 1 |
Species class | 昆虫类精灵 |
Height range | 0.47~0.67M |
Weight range | 2.1~3.4KG |
Movement | Walking (步行) |
Rideable | Yes, single rider |
Perception range | 40 |
Starlight value | 24 |
Shiny variant | Yes |
Favoured environments | Grass |
Disliked environments | Fire, Ground |
Added in version | 1.0.0 (2026-03-26) |
Level-Up Move List
小草虫 learns the following moves by level. Power is blank for moves that do not deal direct damage, and energy is the cost paid to use the move in battle.
Level | Move | Element | Category | Power | Energy |
|---|---|---|---|---|---|
1 | 虫茧 | Bug | Status | - | 1 |
1 | 啃咬 | Bug | Attack | 40 | 0 |
1 | 防御 | Normal | Defence | - | 1 |
5 | 飞叶 | Grass | Attack | 40 | 0 |
8 | 假寐 | Bug | Status | - | 2 |
11 | 抓挠 | Normal | Attack | 35 | 0 |
16 | 虫群智慧 | Bug | Status | - | 3 |
22 | 虫结阵 | Bug | Defence | - | 2 |
24 | 汲取 | Grass | Attack | 30 | 1 |
31 | 孢子 | Grass | Status | - | 3 |
33 | 飞断 | Bug | Attack | 20 | 1 |
40 | 花炮 | Grass | Status | - | 2 |
41 | 花香 | Grass | Attack | 60 | 1 |
48 | 芳香诱引 | Grass | Status | - | 2 |
49 | 网缚 | Bug | Attack | 60 | 2 |
See Also
Old Airship Route - spawn zone
Stone Stone - sibling statue trigger
Hidden Secrets and Collectibles - full hidden spirit list
Statue Trigger Details
The Holy Feather Altar statue accepts a single throw to spawn Caterpillar. The thrown spirit is not consumed and stays in the player's party. Any Water-type spirit at any level qualifies as the trigger; a low-level Water-type works as well as a fully evolved one.
Stone Stone shares the same statue and reacts to a Ground-type throw. Carrying both a Water-type and a Ground-type before teleporting to the altar lets a player complete both hidden spawns on the same visit.
Capture Tips
Approach the spawn from behind once it appears. Backstabbing doubles the first throw's capture rate.
Caterpillar's base capture rate is lower than ordinary wild spirits in the area, so an Advanced Gulu Ball is recommended over the Normal tier.
If the spawn despawns before being caught, leave the zone and re-trigger the statue. The mechanism is repeatable for the throw, but the hidden spirit itself is one-time per account.
Element Notes
Caterpillar is a dual Bug and Grass-type spirit, and its species ability is Flower Spirit (花精灵). Bug-type matchups: strong into Grass, Dark, and Phantom; weak to Fire, Wing, and Mech. The secondary Grass typing shifts some of those matchups, so check the full chart on the Element Types page before leading with it. Carry coverage that handles its weaknesses if Caterpillar is the active spirit during exploration.