Special Stages · Stage 1
Four Years of Fun!!
祝！４周年！！
Four Years of Fun!! is a Battle Cats stage in Birthday Present!. It costs 100 energy and sends 5 enemy spawn lines — led by 4th Anniversary Birthday Cake as the boss — against a 2,000 HP enemy base, and clearing it rewards 8,930 XP. Its enemies carry the Metal trait, so cats that target it do the most work here.
Data updated: 2026-08-31
100Energy Cost
8,930XP Reward
2,000Enemy Base HP
5,000Stage Length
4Max Enemies
1.1Difficulty
Enemy spawns (5)
| Enemy | Strength | Count | First Spawn | Respawn | Base HP Trigger | Notes |
|---|---|---|---|---|---|---|
 Fireworks Guys (High-Yield) | 100% | ∞ | 0s | 10s~16.7s | 100% | — |
 Fireworks Guys (Low-Yield) | 100% | ∞ | 2s | 10s~16.7s | 100% | — |
 4th Anniversary Birthday Cake | 600% | 1 | 0s | — | 100% | Boss |
 Doge | 100% | ∞ | 0s | 2s~33.3s | 100% | — |
 Ms. Sign | 1200% | ∞ | 900s | 900s | 100% | — |