Tryk: A + START på hovedskærmen
Kilder:
– Hørt i Retrokassen podcasten
– https://www.reddit.com/r/gaming/comments/2tbb0n/in_super_mario_brothers_on_the_nes_you_can/
Fra: https://twitter.com/new_cheats_news via
https://www.videogameschronicle.com/news/super-punch-out-multiplayer/