Collaboration Stages · Stage 1
VS RYU (Expert)
VSリュウ 激ムズ
VS RYU (Expert) is a Battle Cats stage in New Challenger. It costs 200 energy and sends 9 enemy spawn lines — led by Ryu (Enemy) as the boss — against a 250,000 HP enemy base, and clearing it rewards 169,200 XP. Its enemies carry the Black trait, so cats that target it do the most work here.
Data updated: 2026-08-31
200Energy Cost
169,200XP Reward
250,000Enemy Base HP
4,500Stage Length
4Max Enemies
6.1Difficulty
Enemy spawns (9)
| Enemy | Strength | Count | First Spawn | Respawn | Base HP Trigger | Notes |
|---|---|---|---|---|---|---|
 Doge Dark | 400% | 3 | 3.3s | 8s~12s | 100% | — |
| Doge Dark | 400% | 3 | 33.3s | 8s~12s | 100% | — |
 Kang Roo | 600% | ∞ | 43.3s | 62s~65.3s | 100% | — |
| Doge Dark | 400% | 3 | 66.7s | 8s~12s | 100% | — |
| Doge Dark | 400% | ∞ | 0s | 26.7s~30s | 99% | — |
| Kang Roo | 600% | 3 | 0s | 38.7s~42s | 99% | — |
 Shadow Boxer K | 100% | 2 | 0s | 66.7s | 99% | — |
 Ryu (Enemy) | 100% | 1 | 0s | — | 99% | Boss |
 Ms. Sign | 100% | ∞ | 900s | 900s | 100% | — |