I used to be a huge fan of the X-Men so I had a Wii game called X-Men Destiny, I don't remember much about the game now except that there was one part where you fight Gambit and he was the most OP boss I've ever fought, even harder than the bosses in Bravely Default, harder than any final boss I've ever fought either. I came back to the game once to see if I could try to beat him since I was older and better at video games but he STILL stomped me. He could jump out of bounds so you couldn't reach him then attack with his cards, I think he could heal himself, and the worst part was that every time you die to him there's an unskippable 3-minute long cutscene before you fight him.

Shiki Ouji (it's my username after all) also Neko Shogun and Arsene. Out of the other party members, Necronomicon and Robin Hood are my favs.