nintendworld
The Extra Room of Mario Party 4 contains a single-player minigame called “Doors of Doom”. It consists entirely out of choosing one of two doors; each one either lets Mario through to the next room, awarding him a point, or opens to reveal Bowser, which ends the game.
The minigame is actually completely rigged from the start. The game determines how many points the player is allowed to receive and the result will be the same no matter which doors are chosen.
In the above footage, the game has decided that Mario should lose after getting 1 point. In the second room, both doors open to reveal Bowser. This can be tested by using an emulator and saving a snapshot of the game. No matter how many times the savestate is reloaded, what frames the inputs are made on, and what doors are chosen, Bowser will always appear after the predetermined allowed number of points.
Main Blog | Twitter | Patreon | Store | Source: myself, Mario Party 4 (NA, GC) in GC emulator