Special Stages · Stage 4

Aku Studies 501: Inquiry

悪魔研究Ⅴ考察

Aku Studies 501: Inquiry is a Battle Cats stage in Empress' Report 5. It costs 100 energy and sends 9 enemy spawn lines — led by Deathkory as the boss — against a 1,000,000 HP enemy base, and clearing it rewards 8,930 XP. Its enemies carry the Metal, Aku and Red traits, so cats that target them do the most work here.

Data updated: 2026-08-31

100Energy Cost
8,930XP Reward
1,000,000Enemy Base HP
5,400Stage Length
12Max Enemies
10.2Difficulty
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Cats that counter Aku Studies 501: Inquiry

Cats whose attacks target Metal, Aku and Red, best DPS first — the traits this stage’s enemies actually carry:

Chun-LiThunder JackLovestruck Lesser DemonBunny & CanardDaybreaker IzanagiMighty Rekon Korps

Stage rewards

100% — Aku Catfruit Seed ×1 · first clear

Enemy spawns (9)

EnemyStrengthCountFirst SpawnRespawnBase HP TriggerNotes
Croconator100%∞0s13.3s~16.7s100%—
Deathkory100%113.3s—100%Boss
Ackey100%133.3s—100%—
Sir Seal4000%733.3s40s~43.3s100%—
Croconator100%566.7s1s100%—
Croconator100%5133.3s1s100%—
Croconator100%5200s1s100%—
Croconator100%5266.7s1s100%—
Ms. Sign100%∞900s900s100%—
All Empress' Report 5 stages