Here’s a helpful report on . Super Brawl 2 MUGEN – Overview & Analysis 1. What Is It? Super Brawl 2 MUGEN is a fan-made crossover fighting game built using the MUGEN engine. It is not an official Nickelodeon or Super Brawl game, but rather a custom creation inspired by the Super Brawl series (flash fighting games featuring Nickelodeon characters).