Special Stages · Stage 2
Aku Studies 101: Methods
悪魔研究Ⅰ方法
Aku Studies 101: Methods is a Battle Cats stage in Empress' Report 1. It costs 100 energy and sends 9 enemy spawn lines — led by J.K Bun Bun as the boss — against a 700,000 HP enemy base, and clearing it rewards 8,930 XP. Its enemies carry the Aku, Red, Black and Floating traits, so cats that target them do the most work here.
Data updated: 2026-08-31
100Energy Cost
8,930XP Reward
700,000Enemy Base HP
5,400Stage Length
10Max Enemies
8.2Difficulty
Enemy spawns (9)
| Enemy | Strength | Count | First Spawn | Respawn | Base HP Trigger | Notes |
|---|---|---|---|---|---|---|
 Cerberus Kids | 400% | ∞ | 3.3s | 13.3s~20s | 100% | — |
 Sir Seal | 1500% | 1 | 6.7s | — | 100% | — |
 Aku Doge | 400% | 2 | 13.3s | 6.7s~10s | 100% | — |
 B.B.Bunny | 1500% | ∞ | 0.1s | 10s~16.7s | 99% | — |
| Aku Doge | 400% | 12 | 0.1s | 20s~23.3s | 99% | — |
 Gory Dark | 250% | 4 | 0.1s | 30s~33.3s | 99% | — |
| Sir Seal | 1500% | 3 | 0.1s | 36.7s~43.3s | 99% | — |
 J.K Bun Bun | 300% | 1 | 0.1s | — | 99% | Boss |
 Ms. Sign | 100% | ∞ | 900s | 900s | 100% | — |