Towers · Stage 21

Floor 21

21階

Floor 21 is a Battle Cats stage in Infernal Tower. It costs 200 energy and sends 11 enemy spawn lines — led by Red Cyclone as the boss — against a 920,000 HP enemy base, and clearing it rewards 17,860 XP. Its enemies carry the Aku, Red and Floating traits, so cats that target them do the most work here.

Data updated: 2026-08-31

200Energy Cost
17,860XP Reward
920,000Enemy Base HP
4,000Stage Length
10Max Enemies
10.1Difficulty
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Cats that counter Floor 21

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

Chun-LiThunder JackLovestruck Lesser DemonBunny & CanardDaybreaker IzanagiMighty Rekon Korps

Stage rewards

20% — Catseye [Special] ×3 · first clear · Treasure Radar20% — Catseye [Rare] ×3 · first clear20% — Catseye [Super Rare] ×3 · first clear20% — Catseye [Uber Rare] ×3 · first clear20% — Catseye [Legend] ×3 · first clear

Enemy spawns (11)

EnemyStrengthCountFirst SpawnRespawnBase HP TriggerNotes
Cerberus Kids600%∞0s2s~6s100%—
B.B.Bunny4000%103.3s1.3s~3.3s100%—
Shy Boy1800%213.3s3.3s~6.7s100%—
St. Pigge the 2nd2000%110s—100%—
Capy150%30s13.3s99%—
B.B.Bunny4000%60s1.3s~2s99%—
Christmas D.600%30s93.3s~94s99%—
B.B.Bunny4000%∞0s66.7s~67.3s99%—
Red Cyclone200%10s—99%Boss
Hackey200%10.1s—99%—
Ms. Sign100%∞900s900s100%—
All Infernal Tower stages