Special Stages · Stage 1
Aku Studies 501: Intro
悪魔研究Ⅴ序論
Aku Studies 501: Intro is a Battle Cats stage in Empress' Report 5. It costs 100 energy and sends 9 enemy spawn lines — led by Camelle as the boss — against a 870,000 HP enemy base, and clearing it rewards 8,930 XP. Its enemies carry the Aku and Black traits, so cats that target them do the most work here.
Data updated: 2026-08-31
100Energy Cost
8,930XP Reward
870,000Enemy Base HP
3,800Stage Length
6Max Enemies
9.5Difficulty
Enemy spawns (9)
| Enemy | Strength | Count | First Spawn | Respawn | Base HP Trigger | Notes |
|---|---|---|---|---|---|---|
 Miz Devil | 300% | 5 | 10s | 20s~23.3s | 100% | — |
 Condemned Peng | 400% | 1 | 13.3s | — | 100% | — |
 Doge Dark | 1000% | 4 | 23.3s | 13.3s~20s | 100% | — |
| Miz Devil | 300% | 8 | 0.1s | 10s~16.7s | 99% | — |
| Condemned Peng | 400% | 3 | 0.1s | 43.3s~50s | 99% | — |
| Doge Dark | 1000% | ∞ | 0.1s | 13.3s~20s | 99% | — |
 Razorback | 100% | 1 | 0.1s | — | 99% | — |
 Camelle | 300% | 1 | 0.1s | — | 99% | Boss |
 Ms. Sign | 100% | ∞ | 900s | 900s | 100% | — |