Slamgma Tunnel

Slamgma Tunnel is an anomalous level found in some personalized copies of Super Mario 64. It has been described as a large maze-like cavern similar to Hazy Maze Cave and other anomalous cave levels, with a unique entity named Slamgma that chases the player. The song found in this area is a cover of Team Fortress 2's "Right Behind You" in the Super Mario 64 soundfont, despite SM64 coming out years before TF2. the level can reportedly be found below the Eternal Star Statue.

Description
Slamgma Tunnel has been described in a similar manner to the Castle Maze if it was a cavern and not a building. It generally appears the same tint of gray as the Eternal Star Statue, likely due to Slamgma. Besides for the music, Slamgma and infinite nature of the level reminiscent of Procedural Generation, there is reportedly nothing of note due to the level being described as "very bland." As such, the missions suck and are just the standard 8 red coins, find a certain room, find 5 secrets that you see in half the course pages on this wiki.

Slamgma
Slamgma is the signature anomalous entity of Slamgma Tunnel. Not a boss or regular enemy like half the course-exclusive entities nobody remembers exist. Similarly to the Wario Apparition, they can suddenly appear and charge at the player, instantly erasing the player's cartridge from existence upon reaching them. Slamgma's appearance is that of a stock image of Heavy TF2 with SigmaShield plastered over them. This has led to speculation that the Eternal Star Statue was actually modeled after Slamgma, either in honor or to mark that they've been sealed underneath it.