Collaboration Stages · Stage 1
Endless Possibility
無限の可能性
Endless Possibility is a Battle Cats stage in Weekend Concert: Day 2. It costs 150 energy and sends 13 enemy spawn lines — led by Hatsune Miku XVI (Enemy) as the boss — against a 240,000 HP enemy base, and clearing it rewards 21,150 XP. Its enemies carry the Black and Floating traits, so cats that target them do the most work here.
Data updated: 2026-08-31
150Energy Cost
21,150XP Reward
240,000Enemy Base HP
4,200Stage Length
15Max Enemies
6.1Difficulty
Enemy spawns (13)
| Enemy | Strength | Count | First Spawn | Respawn | Base HP Trigger | Notes |
|---|---|---|---|---|---|---|
 Glowstick Guys | 100% | 10 | 3.3s | 5s~15s | 100% | — |
 Doge Dark | 200% | 5 | 3.3s | 10s~13.3s | 100% | — |
 Gory Dark | 100% | 1 | 13.3s | — | 100% | — |
| Gory Dark | 100% | 1 | 30s | — | 100% | — |
| Gory Dark | 100% | 1 | 50s | — | 100% | — |
| Doge Dark | 200% | ∞ | -10s | 30s~40s | 99% | — |
| Glowstick Guys | 100% | ∞ | 0s | 10s~20s | 99% | — |
| Glowstick Guys | 100% | 10 | 0s | 3.3s~10s | 99% | — |
 Shadow Boxer K | 100% | 1 | -46.7s | — | 99% | — |
| Shadow Boxer K | 100% | 1 | -26.7s | — | 99% | — |
| Shadow Boxer K | 100% | 1 | 0s | — | 99% | — |
 Hatsune Miku XVI (Enemy) | 100% | 1 | 0s | — | 99% | Boss |
 Ms. Sign | 100% | ∞ | 900s | 900s | 100% | — |