The following is a list of Bosses that appear in Oracle of Seasons.
Brother Goriyas(Gnarled Root Dungeon)
Facade(Snake's Remains)
Omuai(Poison Moth's Lair)
Agunima(Dancing Dragon Dungeon)
Great Moblin(Moblin's Keep)
Syger(Unicorn's Cave)
Vire(Ancient Ruins)
Poe Sisters(Explorer's Crypt)
Frypolar(Sword & Shield Maze)
Aquamentus(Gnarled Root Dungeon)
Dodongo(Snake's Remains)
Mothula(Poison Moth's Lair)
Gohma(Dancing Dragon Dungeon)
Digdogger(Unicorn's Cave)
Manhandla(Ancient Ruins)
Gleeok(Explorer's Crypt)
Medusa Head(Sword & Shield Maze)
Onox(Onox's Castle)
Twinrova(Room of Rites)
Ganon(Room of Rites)