Its defenders are Nightmare forms: wins here drop Nightmare Shards and, rarely, a Nightmare Pokémon. See The Nightmare World.
Defenders
| Pokémon | Types | Level | |
|---|---|---|---|
| Nightmare Sandaconda | ground | 984 | |
| Nightmare Sandslash | ground | 985 | |
| Nightmare Mudsdale | ground | 986 | |
| Nightmare Donphan | ground | 987 | |
| Nightmare Politoed | water | 988 |
Play Nightmare Casseroya Lake now
Nearby maps in Nightmare Inferno
Nightmare North Province · Nightmare Glaseado Mountain · Nightmare East Province · Pits of Inferno