Special Stages · Stage 2
Aku Studies 201: Methods
悪魔研究Ⅱ 方法
Aku Studies 201: Methods is a Battle Cats stage in Empress' Report 2. It costs 100 energy and sends 10 enemy spawn lines — led by Cerberus Kids as the boss — against a 750,000 HP enemy base, and clearing it rewards 8,930 XP. Its enemies carry the Metal, Aku, Floating and Alien traits, so cats that target them do the most work here.
Data updated: 2026-08-31
100Energy Cost
8,930XP Reward
750,000Enemy Base HP
4,000Stage Length
10Max Enemies
9.1Difficulty
Enemy spawns (10)
| Enemy | Strength | Count | First Spawn | Respawn | Base HP Trigger | Notes |
|---|---|---|---|---|---|---|
 Metal Doge | 200% | 2 | 3.3s | 20s~23.3s | 100% | — |
 Cerberus Kids | 500% | 5 | 0.1s | 6.7s~10s | 100% | — |
 Maawth | 1200% | 1 | 20s | — | 100% | — |
| Cerberus Kids | 500% | ∞ | 0.1s | 13.3s~20s | 99% | — |
 Aku Doge | 500% | 8 | 0.1s | 16.7s~23.3s | 99% | — |
| Metal Doge | 200% | 5 | 0.1s | 20s~23.3s | 99% | — |
| Maawth | 1200% | 2 | 0.1s | 46.7s~53.3s | 99% | — |
 Sir Metal Seal | 100% | 2 | 0.1s | 23.3s~26.7s | 99% | — |
| Cerberus Kids | 500% | 1 | 0.1s | — | 99% | Boss |
 Ms. Sign | 100% | ∞ | 900s | 900s | 100% | — |