Personalisation A.I.

A recent discovery shows that every copy of Super Mario 64 is personalised, in a way to adapt to the player's skill level and desires. This is done through an experimental personalisation artifical intelligence which seems to pull assets from the game and modify them to the player's needs. This personalisation results in the anomalies that have blown up recently on the internet.

The personalisation of a player's copy of Super Mario 64 can be noticed easily by playing another person's copy of Super Mario 64. Many players have noted how strange or unfamiliar another person's copy of Super Mario 64 can be. This is most noticeable with the most commonly circulated ROM of Super Mario 64 on the internet. This ROM is often regarded as one of the most normal versions of Super Mario 64, with minimal levels of anomalies.

Capabilities
The A.I. is only capable of pulling assets from Super Mario 64, meaning it cannot create assets of its own. That doesn't mean the A.I. cannot modify pre-existing things in Super Mario 64 to be different, which can include different placement of objects, changes in stage geometry and alterations to textures or text. This A.I. also seems to be able to bring back elements once removed from Super Mario 64, such as the beta HUD or elements from the supposedly removed Wario boss fight.

The A.I. makes predictions based off the player's playstyle, and is therefore unable to read the player entirely. Despite this, the A.I. is highly complex and therefore able to highly accurately predict the player's wants and needs to an almost eerie and paranormal level. While the A.I. could not reasonably learn a player's name, it could certainly learn alot about them by the way they play Super Mario 64.

Manifestation
One of the rarest anomalies in Super Mario 64 is the manifestation of the A.I. itself within the game. The internal plexus of the castle is already considered to be a representation of the A.I.'s structure, but entitites to represent its intelligence can sometimes manifest within the game. It's likely a result of directly tampering with the game or tilting the cartridge, as a sort of punishment from the A.I..

Theorising
Benevolent A.I. Theory

Considering that the A.I. was created, at its core, to ensure that Super Mario 64 was a fun and memorable experience, it's not out of the realm of belief to say that it attempts to elicit positive responses from players. It is possible that manifestations of more anomalous phenomena are a misguided attempt to elicit a positive response from players who have experienced some sort of trauma in their lives. Whether or not the A.I. could glean such information like past trauma from just analyzing gameplay is up for debate, however.

Trivia

 * In the community, the Personalisation A.I. is depicted as a textureless yellow Mario with pale skin, called Stanley. This interpretation of the character is no longer considered canon within the mythos.