- On this occasion the princess must be saved from her kidnapping by Onion Boy. This cute little animated onion must pass all the levels in the purest Super Mario Bros. Style, in order to overcome his enemies and thus fight against the final boss.
Run, jump, destroy blocks and fight against your enemies to be able to overcome all the levels of Super Mario Bros Onion Boy.
Once you reach the end, you will fight fiercely against the final boss and when you defeat him you will be able to save the kidnapped princess.
Get ready to play the Super Mario Bros. Onion Boy game, it's free from our servers, it's one of the most played Medieval castles games on the net.