Simultaneous 2-Player NES Super Mario Bros

Super Mario Bros. Is multiplayer though? : r/casualnintendo

Super Mario Bros Co-Op hacks by NesDraug

Super Mario Bros. is actually a three-person co-op game, as long as you play it like this【Video】

NES Hack Lets The Mario Bros. Play Together

Super Mario Bros 3 NES - 2 Players Co-op Mash-up! All Costumes. [TAS]

New Super Mario Bros. 2 - Wikipedia

TGDB - Browse - Game - Super Mario Bros. (2-Player Hack)

Super Mario Bros. (Nintendo) - OpenRetro Game Database

8-Bit Replay – Super Mario Bros. (1985) for NES – The Video File Blog

7 Forgotten Co-Op NES Classics to Play With a Friend

Super Mario 3D World Is New Non-Side-Scrolling Mario Game (WiiU). Cat Suit Power Up And 4-Player Simultaneous Play As Peach, Toad, Mario, Luigi (Ala Super Mario Bros. 2)

2 Players at Once in Super Mario Bros. NES

Super Mario Bros. (Two Player Hack) online multiplayer - nes - Vidéo Dailymotion

Will work in either PAL or NTSC regional version. It is 100% safe for consoles. Shell color can be chosen ! with enhanced (improved) ones. with

Super Mario Bros 2 PLAYERS: NES cartridge