This is an interesting article on unlocking an Arwing code portion built into the Legend of Zelda: Ocarina of Time Nintendo 64 cartridge. The cleverness of the original programming code reuse and the methods to unlock this hack without a GameShark? Wow.
20200126/https://arstechnica.com/gaming/2020/01/how-to-get-star-fox-64-ships-into-ocarina-of-time-no-hacking-required/
N.B. The Ocarina of Time Nintendo 64 game was in-development for a pretty long time, so it was last when many Nintendo 64 games and technologies were already developed and in their prime.