Mario, but he's made up of Super Mario World sprites.

I made some more:

Megaman: https://imgur.com/a/WkLnnqy

Megaman X: https://imgur.com/a/SqO08Hf

Zero: https://imgur.com/a/WT9EtuB

Mario: https://imgur.com/a/Higt0wb

Mario 30: https://imgur.com/a/g5pJ7Nu

Luigi: https://imgur.com/a/1h9WoPC

Mario Movie Screenshot: https://imgur.com/a/18WjzG8

I also got very good results by manually selecting the sprites:

Mario: https://imgur.com/a/MClyWtn

Luigi: https://imgur.com/a/CXZXJ2z