As in, will it still unlock that monster in the Bestiary if you change it to easy? I'm having troubles with Raspatil. --- The Silver Surfer's like an M&M: Silvery coating on the outside, and ultimate Cosmic Goodness on the inside.
The only thing you'll lock is an achievement for the strongest C'ieth monster in the game. Well... second strongest. And you can undo this by switching back to normal anytime. So, no. There's no harm in switching to easy.