TV Tropes has an excellent summary of the game. Over 80+ bosses, including 9 World bosses, to test your skills. Hundreds of enemies to keep you on your toes. Guns from a variety of games like Metal Slug, Doom, Halo, Contra and Quake. Fusion power-up suits like Halo’s Spartan Armor for Mario, Duke Nukem for Wario and Eri Kasamoto for Roll. Over 200 levels spanned across 9 Worlds. Each character comes with their own unique playstyle, weapons and power-ups.
17 playable characters including Mario, Sonic, Mega Man, Samus Aran, Simon Belmont and Arthur (Ghosts ’n Goblins).
Mushroom Kingdom Fusion (MKFusion or simply MKF for short) is an unofficial, non-profit Mario fan-game crossed over with many other video game franchises.
