VS. Super Mario Bros.

Vs. Super Mario Bros. is a two-player arcade version of Super Mario Bros. (1985, NES) which was released in 1986.

Story
Mario (or Luigi) sets out on a quest to free Princess Toadstool from the evil Bowser and restore the fallen kingdom of the Mushroom People. The player's character moves from left to right over a horizontally scrolling terrain. They must avoid obstacles, destroy enemies by jumping on them, collect coins and power-ups and reveal several hidden items throughout the various levels.

Differences
This game is harder than the original Super Mario Bros., with less warp zones and power-ups, and more enemies. Some of the courses were even taken from the sequel, Super Mario Bros.: The Lost Levels, which wasn't released outside of Japan for fear it would be too hard for Western gamers.

Pre-production
At some point in the North American localization of Vs. Super Mario Bros., the game was to be called Mario's Adventure. The only remnant of this earlier title is an arcade flyer with a trademarked name. Mario's Adventure arcade flyers