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Nintendo’s new WarioWare game contains Luigi’s Mansion beta assets | VGC
Fans are using the E3 2001 graphics to rebuild a pre-release version of the game…

Fans working on a restoration of the E3 2001 Luigi’s Mansion version discovered that WarioWare’s microgame actually contains pre-release assets, with more detail than in the final game.
The assets include furniture such as chairs, sofas and tablecloths at much higher resolution than was included in the final GameCube game.
It’s a significant find for video game historians, and Luigi’s Mansion Beta Restoration mod developer Portable Productions has already put the WarioWare assets into a working version of the game (see below).
The Luigi’s Mansion Beta Restoration mod is described as a “1:1 recreation” of the game’s first public demo shown at E3 2021, which includes various differences to the final game including new characters, gameplay systems and scenery.
“This 1:1 recreation is my love letter to the Luigi’s Mansion community, so please take a moment to embrace, the most accurate Luigi’s Mansion beta restoration OF ALL TIME,” the mod developer behind Luigi’s Mansion Beta Restoration says.