Special Stages · Stage 1
400m Relay: Fast Start
400mリレー 第1走者
400m Relay: Fast Start is a Battle Cats stage in River City Relay. It costs 100 energy and sends 12 enemy spawn lines — led by Le'boin as the boss — against a 25,000 HP enemy base, and clearing it rewards 8,930 XP.
Data updated: 2026-08-31
100Energy Cost
8,930XP Reward
25,000Enemy Base HP
5,700Stage Length
20Max Enemies
3.1Difficulty
Enemy spawns (12)
| Enemy | Strength | Count | First Spawn | Respawn | Base HP Trigger | Notes |
|---|---|---|---|---|---|---|
 Relay Base (Enemy Base) | 250000% | 1 | 0s | — | 0% | Enemy base |
 Snache | 200% | ∞ | 3.3s | 6.7s~10s | 100% | — |
 Hippoe | 200% | 1 | 10s | — | 100% | — |
| Hippoe | 200% | 1 | 16.7s | — | 100% | — |
 Large White Ball | 1000% | 1 | 23.3s | — | 100% | — |
 White Wind | 25% | ∞ | 25.3s | 20s~33.3s | 100% | — |
 Kang Roo | 200% | 1 | 30s | — | 100% | — |
 Teacher Bear | 200% | 1 | 33.3s | — | 100% | — |
 Le'boin | 200% | 1 | 40s | — | 100% | Boss |
| Kang Roo | 200% | 1 | 60s | — | 100% | — |
| Large White Ball | 1000% | 2 | 66.7s | 20s~26.7s | 100% | — |
 Ms. Sign | 100% | ∞ | 900s | 900s | 100% | — |