Traitor Toad Tussle

Traitor Toad Tussle is an anomalous level found in some personalized copies of Super Mario 64 DS. It is most commonly described as an abandoned building apparently buried deep beneath Princess Peach's Castle, potentially the equivalent of Floor 2B. The level is commonly used to unlock a playable Toad and can even have an evil Toad as it's boss fight. This level is typically found in a hidden room of Princess Peach's Castle, usually behind a wall of some kind, potentially referencing the "trapped behind the castle walls" quotes from the Toads found throughout the game.

Description
As previously stated, Traitor Toad Tussle appears to be an abandoned floor of Princess Peach's Castle. It typically borrows textures from the castle basement, Whomp's Fortress, grass textures from Bob-omb Battlefield to represent moss and vines, and even some Bowser levels. It reportedly relies on heavy usage of bottomless pits, breakable blocks, and even holes in the wall used to traverse the area. It is also very dark, with torches being the primary light source scarcely found throughout the entire level. This level typically has no enemies, but if it does, it usually contains Goombas, Piranha Plants and Bob-ombs.

Power Stars
Like any other level of this nature, Traitor Toad Tussle has an 8 red coins mission. There's also a common mission where the player has to break down a wall to find a hidden Power Star. This wall is usually indicated by a crack in the wall, similarly to the supposed crack texture on the wall with the Whomp's Fortress 1-Up, or a tilted and broken painting of some kind to indicate that this wall is unique.

Boss Fight
The boss fight associated with Traitor Toad Tussle is unique, as it appears to be a new variant of the Enemy Toad phenomenon in most reports, being a tall Toad with black spots eerily reminiscent of the Prisoner. This boss has been nicknamed the Traitor Toad, hence the level's name. Their dialogue typically says something about how they've pledged their allegiance to Bowser and that they were the one to seal the Toads in the castle walls. Their boss fight typically consists of the same attacks that Enemy Toads can use, and even use the attacks of some player characters, such as attempting to ground pound or dive at the player. They usually are damaged simply by being jumped on or ground pounded, but some say that the Bob-ombs in the level can be thrown at the boss to damage them. Upon being defeated, some say that a playable Toad, seemingly created entirely by the A.I., can be unlocked.

Theorizing
Like the playable Toad phenomenon, it is believed that Traitor Toad Tussle was created entirely by the Personalization A.I. For whatever reason, the A.I. decided to create a playable Toad in some copies. Unlike Princess Peach, where they have unused animations for walking and running that the A.I. could build off of, there is no known remnants of a playable Toad of any kind to inspire this anomaly. It could potentially simply be the A.I. wanting to make a Toad playable due to their prominence throughout the castle, as it was the last "protagonist" left, as Peach was at least potentially intended to be playable, so the A.I. wanted to make a playable Toad for "completion". This is, of course, assuming the A.I. can "think" to some extent, and it didn't just make a playable Toad because it could.