The first boss of Mario’s first true portable adventure, King Totomesu is an evil lion monster and a decent boss battle.

Ironically he acts like Bowser from the Super Mario Bros 1 and 2 in attack. He shoots fireballs at you which you have to dodge.

Like the Bowser fights in SMB1 and 2, all you have to do is get to the other side, and it’s goodbye Mr. Boss.