Collaboration Stages · Stage 4
高雄MRT レッドライン — Stage 4
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高雄MRT レッドライン — Stage 4 is a Battle Cats stage in 高雄MRT レッドライン. It costs 150 energy and sends 11 enemy spawn lines — led by Those Guys as the boss — against a 150,000 HP enemy base, and clearing it rewards 84,600 XP.
Data updated: 2026-08-31
150Energy Cost
84,600XP Reward
150,000Enemy Base HP
4,000Stage Length
20Max Enemies
5.1Difficulty
Enemy spawns (11)
| Enemy | Strength | Count | First Spawn | Respawn | Base HP Trigger | Notes |
|---|---|---|---|---|---|---|
 HAPPI (Enemy) | 100% | 1 | 20s | — | 100% | — |
 Those Guys | 600% | 10 | 3.3s | 8s~12s | 100% | — |
| Those Guys | 600% | 10 | 16.7s | 6.7s~10s | 100% | — |
| Those Guys | 600% | 10 | 33.3s | 5.3s~8s | 100% | — |
| Those Guys | 600% | 10 | 50s | 4s~6s | 100% | — |
| Those Guys | 600% | 10 | 66.7s | 2.7s~4s | 100% | — |
| HAPPI (Enemy) | 100% | 5 | 0s | 23.3s | 99% | — |
| HAPPI (Enemy) | 100% | 7 | 0s | 40s | 99% | — |
| HAPPI (Enemy) | 100% | 3 | 0s | 50s~53.3s | 99% | — |
| Those Guys | 600% | 1 | 0s | — | 99% | Boss |
 Ms. Sign | 100% | ∞ | 900s | 900s | 100% | — |