[quote=Bluebe123]
Yes, you're required to use a boss from a game. If the game doesn't exist, then you cannot use a boss from it.
[/quote]

Okay, thanks.

I'll go think of something. Hmmm...
I kind of want to get a character from Shadow of the Colossus. Generally, they're huge. Like, the boss battles are also platforming puzzles on top of them. They have clear weak points though.

But you need a very specific weapon to defeat them, 'The ancient sword'. Back to the drawing board.