Special Stages · Stage 1
9 Years of Fun!
祝！９と１/２周年！！
9 Years of Fun! is a Battle Cats stage in Birthday Present!. It costs 9 energy and sends 5 enemy spawn lines — led by 9th Anniversary Birthday Cake as the boss — against a 1,000 HP enemy base, and clearing it rewards 465 XP. Its enemies carry the Metal trait, so cats that target it do the most work here.
Data updated: 2026-08-31
9Energy Cost
465XP Reward
1,000Enemy Base HP
4,500Stage Length
5Max 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% | ∞ | 5s | 10s~16.7s | 100% | — |
 Doge | 100% | ∞ | 6.7s | 6.7s~33.3s | 100% | — |
 9th Anniversary Birthday Cake | 100% | 1 | 0s | — | 100% | Boss |
 Ms. Sign | 100% | ∞ | 900s | 900s | 100% | — |