Overview
A guide describing the conditions to unlock each character
Squilla
Beat the game on any difficulty to unlock Squilla (the mantis shrimp)
King Crab
Beat the game on Normal difficulty as Squilla to unlock the King Crab
Anomalocaris
Beat the game on Normal as King Crab to unlock Anomalocaris
Diver
Beat the EX mode to unlock Diver
Ebizuka
Beat the game on Hard as Diver to unlock Ebizuka