Special Stages · Stage 1

Aku Studies 401: Intro

悪魔研究Ⅳ序論

Aku Studies 401: Intro is a Battle Cats stage in Empress' Report 4. It costs 100 energy and sends 8 enemy spawn lines against a 860,000 HP enemy base, and clearing it rewards 8,930 XP. Its enemies carry the Red, Aku and Alien traits, so cats that target them do the most work here.

Data updated: 2026-08-31

100Energy Cost
8,930XP Reward
860,000Enemy Base HP
4,200Stage Length
12Max Enemies
9.4Difficulty
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Cats that counter Aku Studies 401: Intro

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

Warlock and PierreChun-LiThunder JackLovestruck Lesser DemonTakeda ShingenNezuko Kamado

Stage rewards

100% — Catamin [A] ×3 · first clear

Enemy spawns (8)

EnemyStrengthCountFirst SpawnRespawnBase HP TriggerNotes
B.B.Bunny4000%∞3.3s13.3s~16.7s100%—
Sinner Snache500%2013.3s16.7s~20s100%—
Cerberus Kids500%∞16.7s16.7s~23.3s100%—
Star Peng2500%826.7s20s~26.7s100%—
Project A2300%240s66.7s~70s100%—
General GreGory2500%446.7s26.7s~30s100%—
Sinner Snache500%2066.7s6s~8s100%—
Ms. Sign100%∞900s900s100%—
All Empress' Report 4 stages