Special Stages · Stage 4
Aku's Whisper (Merciless)
悪魔の囁き 超極ムズ
Aku's Whisper (Merciless) is a Battle Cats stage in Growing Evil. It costs 300 energy and sends 10 enemy spawn lines — led by Cerberus Kids as the boss — against a 900,000 HP enemy base, and clearing it rewards 28,200 XP. Its enemies carry the Aku trait, so cats that target it do the most work here.
Data updated: 2026-08-31
300Energy Cost
28,200XP Reward
900,000Enemy Base HP
4,500Stage Length
20Max Enemies
9.4Difficulty
Enemy spawns (10)
| Enemy | Strength | Count | First Spawn | Respawn | Base HP Trigger | Notes |
|---|---|---|---|---|---|---|
 Aku Altar (Enemy Base) | 900% | 1 | 0.1s | — | 0% | Enemy base |
 Cerberus Kids | 300% | 10 | 0s | 0.7s~3.3s | 100% | — |
 Miz Devil | 300% | 5 | 30s | 0.7s~2s | 100% | — |
| Cerberus Kids | 300% | ∞ | 0s | 10s~20s | 99% | — |
 Sinner Snache | 300% | ∞ | 0s | 20s~40s | 99% | — |
| Sinner Snache | 300% | 12 | 0s | 3.3s~6.7s | 99% | — |
 Condemned Peng | 300% | 6 | 0s | 6.7s~13.3s | 99% | — |
 Fallen Bear | 150% | 2 | 0s | 20s | 99% | — |
| Cerberus Kids | 100% | 1 | 0s | — | 99% | Boss |
 Ms. Sign | 100% | ∞ | 900s | 900s | 100% | — |