Banjo and Kazooie had to help Godzilla fight an army of monsters that were arriving at the Isle O' Hags and it seemed like manageable trouble until Gruntilda decided to mess with the bear and bird by having her own minions increase in size which of course made the king of the monsters mad since Gojira had to rest every time he fired off his atomic breath and there as only so much he could do because he roared at the warty wicked witch who simply cackled right back at him and used her magic to turn him into a frog, with Banjo-Kazooie now having to find a way to reverse the spell since Grunty chased them alongside the kaiju rogue gallery that was tearing the entire place apart with ease.