Mar

Mar, is an entity who could've appeared in the beta of Super Mario 64 at very specific cases, he is a personification of the Personalisation A.I, this entity was apparently only in one build before the devs decided to cut him entirely. The build as well as the code for Mar is lost with no signs of even existing in Nintendo's archive.

His look is a slightly darker version of Mario without any Images (No eyes, mustache, sideburns, overalls buttons or M logo)

Apparition
It's still unclear as to how you can actually make Mar appear but it's rumored that to make him appear you need to:


 * 1) Beat the game at 100%
 * 2) Unlock Luigi
 * 3) Play with another player
 * 4) Have both players be at 4 Lives
 * 5) Go to the mirror room
 * 6) Look at the mirror for 4 Minutes
 * 7) Mar should appear looking at Mario and Luigi as well as a new Lives Counter displaying fours as much as the screen can fit.

The game will crash shortly after.

Relationships
It's rumored that Mar and Stanley are connected, they share the same appearence.

Trivia

 * Mar appeared in a joke tweet of Greenio
 * Greenio confirmed that this is just a "Red Stanley"