Special Stages · Stage 10
2021 Debut
2021年デビュー
2021 Debut is a Battle Cats stage in Pt. 2: Enemy Maneuvers. It costs 200 energy and sends 13 enemy spawn lines — led by Aku Cyclone as the boss — against a 840,000 HP enemy base, and clearing it rewards 17,860 XP. Its enemies carry the Aku, Red and Metal traits, so cats that target them do the most work here.
Data updated: 2026-08-31
200Energy Cost
17,860XP Reward
840,000Enemy Base HP
4,000Stage Length
25Max Enemies
9.1Difficulty
Enemy spawns (13)
| Enemy | Strength | Count | First Spawn | Respawn | Base HP Trigger | Notes |
|---|---|---|---|---|---|---|
 Aku Doge | 300% | 5 | 5s | 6.7s~10s | 100% | — |
| Aku Doge | 300% | 5 | 50s | 3.3s~5s | 100% | — |
 Large White Ball | 24000% | 1 | 33.3s | — | 100% | — |
 Large Red Ball | 2400% | 1 | 33.3s | — | 100% | — |
 Large Iron Ball | 600% | 1 | 33.3s | — | 100% | — |
| Large Iron Ball | 600% | 4 | -60s | 4s~8s | 99% | — |
| Large Red Ball | 2400% | 4 | -36.7s | 1.3s~2.7s | 99% | — |
| Large White Ball | 24000% | 4 | -10s | 2.7s~5.3s | 99% | — |
 Aku Gory | 100% | 4 | 0s | 15s~20s | 99% | — |
| Aku Doge | 300% | 8 | 0s | 10s~15s | 99% | — |
 Cerberus Kids | 300% | 16 | 0s | 5s~10s | 99% | — |
 Aku Cyclone | 100% | 1 | 0s | — | 99% | Boss |
 Ms. Sign | 100% | ∞ | 900s | 900s | 100% | — |