Special Stages · Stage 1
Grats! 2 Years!!
祝！２周年！！
Grats! 2 Years!! is a Battle Cats stage in Happy Birthday! No. 2. It costs 2 energy and sends 5 enemy spawn lines — led by Birthday Cake as the boss — against a 20,000 HP enemy base, and clearing it rewards 103 XP. Its enemies carry the Metal trait, so cats that target it do the most work here.
Data updated: 2026-08-31
2Energy Cost
103XP Reward
20,000Enemy Base HP
3,600Stage Length
9Max Enemies
1.1Difficulty
Enemy spawns (5)
| Enemy | Strength | Count | First Spawn | Respawn | Base HP Trigger | Notes |
|---|---|---|---|---|---|---|
 Doge | 100% | 8 | 26.7s | 6.7s~20s | 100% | — |
 Snache | 100% | 8 | 13.3s | 6.7s~26.7s | 100% | — |
 Those Guys | 100% | 8 | 0s | 6.7s~33.3s | 100% | — |
 Birthday Cake | 100% | 1 | 13.3s | — | 100% | Boss |
 Ms. Sign | 100% | ∞ | 900s | 900s | 100% | — |