Big Chungus

Big Chungus is an anomalous entity that can be found in some personalized copies of Super Mario 64. They are described as a large gray rabbit with a lighter gray stomach and lower jaw, first seen in Looney Toons when Bugs Bunny transforms into Big Chungus in order to mock another character. Big Chungus has been reported to appear in some personalized copies of Super Mario 64.

Description
Big Chungus has been reported to appear in place of the MIPS the Rabbit character with varying behaviors. Many have claimed that Big Chungus has just stood in place, blocking off the hallway they are inside of due to their size. Alternatively, it can act exactly the same as MIPS the Rabbit, reportedly even adopting the yellow color scheme of MIPS the Rabbit in a form known as MIPS Chungus. They have also been reported to have strange dialogue, such as:

"Big"

Report 1
"Okay. I went to the basement to go to Lethal Lava Land, right? And this huge rabbit was just blocking the hallway. I tried to talk to it, and it just said "hello I am Big Chungus go away" and then my game crashed. What?"