Cerulean Cave
Entered from Cerulean Cave.
- COST
- 2,500 Cave Tokens
- LEVEL
- Lv 83
- ENEMY HP
- 28,735
- TIME
- 60 s
- FLOOR
- 5×5, 5 chests
- TOKENS / CATCH
- 135
HP shown with no chests opened. Each chest you open adds 20% HP to the enemies and the boss for the rest of the run.
How to open it
- Become the Kanto Champion
- The guard won't let you past the entrance
Boss
One of these waits at the end of each run:
| Boss | Pokémon | Level | HP | Chance | Note |
|---|---|---|---|---|---|
| Wild boss (can be caught) |  Kadabra | 60 | 183,675 | 50% | |
| Wild boss (can be caught) |  Mewtwo | 100 | 255,512 | 50% | after step 16 of Project M2 |
Wild Pokémon
Share of the wild fights on the floor (trainers included in the 100%).
| Pokémon | Chance |
|---|---|
 Golbat | 7.1% |
 Parasect | 7.1% |
 Psyduck | 7.1% |
 Golduck | 7.1% |
 Primeape | 7.1% |
 Poliwag | 7.1% |
 Machoke | 7.1% |
 Slowpoke | 7.1% |
 Slowbro | 7.1% |
 Magneton | 7.1% |
 Electrode | 7.1% |
 Goldeen | 7.1% |
 Magikarp | 7.1% |
 Ditto | 7.1% |
Chest loot
A chest first rolls a rarity, then an item of that rarity. The more times you have cleared the dungeon, the more often the rarer rarities come up (up to 500 clears). A chest sometimes holds more than one of the item.
COMMON · 75% → 60%
Poké Ball 29% of common chests 
Token Magnet 29% of common chests 
Lucky Incense 29% of common chests 
Graveler (Pokémon) 14% of common chests RARE · 20% → 25%
Blue Shard 25% of rare chests 
Green Shard 25% of rare chests 
Red Shard 25% of rare chests 
Yellow Shard 25% of rare chests EPIC · 4.01% → 10%
Great Ball 100% of epic chests LEGENDARY · 1.00% → 3.99%
Ultra Ball 100% of legendary chests MYTHIC · 0.01% → 1.06%
Large Recharge 33% of mythic chests 
Max Revive 67% of mythic chests Achievements
Clearing it 10, 100, 250 and 500 times gives the Delver, Spelunker, Old Hand and Resident achievements (see Achievements).