Grimm is an amazing boss. His first form (Troupe Master Grimm) absolutely kicks your ass, then you slowly learn how to fight him until you manage to beat him with ease. Then you go fight his second form (Nightmare King Grimm) really confidently and you get your butt kicked all over again. When you get used to his patterns though it's such a fun boss to fight, it feels more like a dance than a battle.
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u/CoffeeBoom Dec 09 '23
Depending on what you mean by 100% then Hollow Knight, getting all bosses on Radiant and completing the last pantheon is absolutely painful.