Mr. I is a giant eye enemy in Super Mario 64 that shoots white projectiles. A few live in haunted houses and hells in the video game Super Mario 64 on the Nintendo 64. Mario can kill it by running around it, to make the Mr. I "roll its eyes" and die.
It appears occasionally in SuperMarioGlitchy4's videos, usually making cameo appearances, such as frightening characters who encounter it. A larger variation of Mr. I called Big Mr. I exists in Super Mario 64 as well. It is encountered in the secret room of Big Boo's Haunt.