New images of Punch-Out!!'s 'Head-to-Head' mode – Destructoid
Punch Out!! Wii Hacks] Infinite Health, Stamina and Star Power - YouTube
PUNCH OUT CONTROLS
New Punch-Out!! Wii hack in the works. : r/punchout
Super Punch-Out!! new cheat codes found, including multiplayer
Two cheat codes have been discovered in 1994 game 'Super Punch-Out!!'
Secret hack to Playing Punch Out!! - Collab Wii Gameplay Review - YouTube
Super Punch-Out!! Had A Secret 2-Player Mode All Along
plusnine's Punch-Out!! Wii HD-Ready Project (updated September 8, 2016)
RetroSpective - Punch-Out!! - Rings & Coins
How to unlock all Punch Out Wii characters (guide) - Video Games Blogger
Punch-Out!! — StrategyWiki, the video game walkthrough and strategy guide wiki
Super Punch Out 2 Player Mode Discovered After 28 Years | RetroRGB
Wii Cheats - Punch-Out!! Wiki Guide - IGN
SummoningSalt on Twitter: "This is unbelievable. Apparently, Super Punch-Out has a 2 player mode that went undiscovered for 28 years. @new_cheats_news just found it today." / Twitter