Found this Debug version of Master Quest. The Wife loves it! : r/n64

The Legend of Zelda Ocarina of Time Master Quest PAL Debug ROM now has a 100% matching decompiled source code repository! : r/emulation

Unused Content - Zelda Wiki

Planet Mozilla

The Legend of Zelda : Ocarina of Time Master Quest [USA] - Nintendo 64 (N64) rom download

The Debug Code Has Been Found For Paper Mario: The Thousand-Year Door

Searching for the Ocrina of time debug version(not master quest) : r/Roms

N64 Debug Menus

GameTronik - Legend of Zelda, The - Ocarina of Time - Master Quest (USA) (Debug Edition) (No Intro - Nintendo 64)

[Zelda: OoT Master Quest] Debug Mode Experiments (ZELDAOOTMA)(Project64)

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Found this Debug version of Master Quest. The Wife loves it! : r/n64

Searching for the Ocrina of time debug version(not master quest) : r/Roms

Zelda 64's Game Code Has Been Successfully Reverse-Engineered, Making Mods And Ports Possible