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Marvin the Mouse is a mouse critter that appears in Conker's Bad Fur Day and Conker: Live & Reloaded who has a habit of burping and farting from time to time in which his gases cause Conker to vomit if close to them. When first entering the Barn Boys area, Jack the talking metal block asks Conker to get rid of Marvin to get the larger female block off of him. To do this, Conker has to feed Marvin cheese. Each cheese fed to Marvin gets him bloated with gas. After Conker feeds Marvin three pieces of Cheese from the "Cheese Farm", the mouse gets bloated into exploding, turning him into a bloody mess.

At the end of the game, it is shown that he had somehow survived getting blown to bits and has been sewn together, still hungry for Cheese and now standing beside his new king. Oddly enough, even though Conker was responsible for his current condition, he doesn't seem to have any hard feelings for Conker and seemed willing to consider him king of the land. Most likely because Marvin never figured out Conker blew him up on purpose.



  • "Smell this one!" {farts on Jack}
  • "That was nice! I'd like another, though, if that's OK."
  • "Marvellous! One more should just about do it."
  • "Oh no, I think I had too much!"
  • "Marvellous! Yea I like it in here! Ooh, cheese!


  • When he blows up, his tail wags, then stops moving and farts, but even though a fart sound is heard, a burp cloud comes out.
  • Marvin first walk on 4 legs, after the first cheese he waddles on 2 and after the second one he walks a bit just to then stop moving.
  • After eating the first cheese, Marvin will start making a bubbly sound every now and then when he moves.
  • In the 64 version Marvin's burps and farts will cause Conker to puke, but nothing happens if Conker jumps into them in the Xbox version.
  • In the 64 version Marvin's paws and feet have a bit of white fur near his fingers and toes. In the Xbox version his full palm and bottom part of his feet are white as well.
  • Every time Marvin farts, he will open his mouth in relief.
  • In the demo there is a phrase unused in the final game. Marvin says "Your missus sure is gonna smell a big stinker out of my f*cking ass {farts on Jack}
  • There is an unused phrase for Marvin in the final game. "Did you smell that too? It sure smells good"
  • The first cheese will make him burp, the second and last cheese will make him fart.
  • He has black eyes in Conker's Bad Fur Day and blue eyes in Conker: Live & Reloaded.
  • He farts by lifting his right leg and right arm on the 64 version, on the Xbox version he will lower his body and let out the fart.
  • On the Xbox version after the first cheese he will burp after the cutscene.
  • On the 64 version Marvin will inflate after the second cheese, on Xbox version nothing happens.
  • The hairs that Marvin has on his head are brown in the 64 version, but white on the Xbox version.
  • Although Marvin blinks from time to time in both versions and in a cutscene when he burps, in Live and Reloaded some more blinks were added during cutscenes.
  • In the throne room in Conker's Bad Fur Day Marvin just stands next to the throne and looks at a cheese. In Live and Reloaded he is sitting down and then lays back with a hand on his belly.
  • Marvin can be heard tasting his burps from time to time after he has burped.
  • Marvin might say oooh or uuuh when feeling a fart coming, but if he's going to fart a small fart, he'll always say oooh or uuuh right before farting it.
  • When Marvin farts on Jack the fart cloud is bigger than his usual farts.
  • When Marvin goes to burp on Jack, he might use some burps he only does to Jack.