Main Chapters · Stage 21
Cats of the Cosmos Ch. 2 (Zombie) — Stage 21
アルデバラン
Cats of the Cosmos Ch. 2 (Zombie) — Stage 21 is a Battle Cats stage in Cats of the Cosmos Ch. 2 (Zombie). It costs 83 energy and sends 14 enemy spawn lines against a 324,000 HP enemy base, and clearing it rewards 7,000 XP. Its enemies carry the Zombie, Red, Floating and Alien traits, so cats that target them do the most work here.
Data updated: 2026-08-31
83Energy Cost
7,000XP Reward
324,000Enemy Base HP
5,000Stage Length
10Max Enemies
9.1Difficulty
Enemy spawns (14)
| Enemy | Strength | Count | First Spawn | Respawn | Base HP Trigger | Notes |
|---|---|---|---|---|---|---|
 Znache | 300% | 1 | 3.3s | — | 100% | — |
 Shy Boy | 1600% | 1 | 16.7s | — | 100% | — |
 Zoge | 300% | 1 | 16.7s | — | 100% | — |
 Ribbo | 600% | 2 | 16.7s | 33.3s | 100% | — |
 Sir Seal | 2200% | 3 | 33.3s | 26.7s | 100% | — |
| Znache | 300% | 2 | 36.7s | 1s~2s | 100% | — |
| Zoge | 300% | 2 | 37.3s | 1s~2s | 100% | — |
 Star Peng | 1100% | 1 | 53.3s | — | 100% | — |
| Znache | 300% | 2 | 56.7s | 1.3s~2.7s | 100% | — |
| Zoge | 300% | 2 | 57.3s | 1.7s~3s | 100% | — |
| Shy Boy | 1600% | 1 | 73.3s | — | 100% | — |
| Znache | 300% | 2 | 80s | 1.3s~2.7s | 100% | — |
| Zoge | 300% | 2 | 83.3s | 1.7s~3s | 100% | — |
 Ms. Sign | 100% | ∞ | 900s | 900s | 100% | — |