Special Stages · Stage 3
Aku Studies 301: Field Research
悪魔研究Ⅲ発見
Aku Studies 301: Field Research is a Battle Cats stage in Empress' Report 3. It costs 100 energy and sends 13 enemy spawn lines — led by THE SLOTH as the boss — against a 845,000 HP enemy base, and clearing it rewards 8,930 XP. Its enemies carry the Aku, Angel and Red traits, so cats that target them do the most work here.
Data updated: 2026-08-31
100Energy Cost
8,930XP Reward
845,000Enemy Base HP
5,000Stage Length
50Max Enemies
9.3Difficulty
Enemy spawns (13)
| Enemy | Strength | Count | First Spawn | Respawn | Base HP Trigger | Notes |
|---|---|---|---|---|---|---|
 Cerberus Kids | 500% | ∞ | 3.3s | 10s~13.3s | 100% | — |
 Those Guys | 4000% | ∞ | 3.3s | 2s~6s | 100% | — |
 THE SLOTH | 400% | 1 | 6.7s | — | 100% | Boss |
 Aku Doge | 500% | 20 | 6.7s | 10s~13.3s | 100% | — |
 Mr. Angel | 150% | 30 | 16.7s | 5s~10s | 100% | — |
| Mr. Angel | 150% | 30 | 30s | 2s~4s | 100% | — |
| Cerberus Kids | 500% | 30 | 30s | 3.3s~6.7s | 100% | — |
| Aku Doge | 500% | 20 | 40s | 4s~6s | 100% | — |
 Mr. Mole | 100% | 1 | 53.3s | — | 100% | — |
 Ginger Snache | 300% | 20 | 53.3s | 4s~8s | 100% | — |
| Ginger Snache | 300% | 20 | 73.3s | 3s~6s | 100% | — |
| Aku Doge | 500% | 20 | 93.3s | 2s~4s | 100% | — |
 Ms. Sign | 100% | ∞ | 900s | 900s | 100% | — |