Boss Spots

Ice Queen
Location: Devias 3 (53, 190)
Monster Spot: 4
Respawn Time: 15 seconds
Very rare chance: Rare Pet Material
Very rare chance:  Ice Queen Baby Pet

Gorgon
Location: Dungeon 3 (27, 121)
Monster Spot: 4
Respawn Time: 15 seconds
Very rare chance: Rare Pet Material, 
Very rare chance:  Gorgon Baby Pet

Balrog
Location: Lost Tower 7 (28, 212)
Monster Spot: 4
Respawn Time: 15 seconds
Very rare chance: Rare Pet Material, Baby Pet Balrog
Very rare chance:  Balrog Baby Pet

Hydra
Locations:
Atlans 2 (27, 204)
Atlans 3 (217, 191)
Monster Spot: 4 at each location
Respawn Time: 15 seconds
Very rare chance: Rare Pet Material, Baby Pet Hydra
Very rare chance:  Hydra Baby Pet

Death Beam Knight and Zaikan
Location: Tarkan 4
Death Beam Knight: (6, 240)
Zaikan: (155, 163)
Monster Spot: 1 (Death Beam Knight) and 2 (Zaikan)
Respawn Time: 15 seconds
Very rare chance: Rare Pet Material

Hell Maine
Locations: Aida2 (99, 145)
Monster Spot: 4 at each location
Respawn Time: 15 seconds
Very rare chance: Rare Pet Material, Baby Pet Hydra
Very rare chance:  Hell Maine Baby Pet

Phoenix
Locations: Icarus (9, 16)
Monster Spot: 4 at each location
Respawn Time: 15 seconds
Very rare chance: Rare Pet Material, Baby Pet Hydra
Very rare chance:  Phoenix Baby Pet