Tatanga is the main antagonist of Super Mario Land and a minor antagonist in Super Mario Land 2: 6 Golden Coins. He is an alien who usually fights inside a spaceship.
Super Mario Land
Tatanga appeared as the main antagonist of Super Mario Land. He invaded Sarasaland and kidnapped Princess Daisy to marry her and make her his queen so he could rule Sarasaland. Mario traveled through four kingdoms and fought Tatanga. Mario defeated him and rescued Daisy.
Super Mario Land 2: 6 Golden Coins
Though he appeared to die in the previous battle, only his ship was destroyed. Tatanga survived, and fled to Wario's castle.
It is revealed that Wario paid Tatanga to kidnap Daisy as a distraction so he could take over Mario's castle. Tatanga is one of the six bosses in the game before Wario. Mario defeated him in the Space Zone, apparently destroying him for good this time. He has not been seen since.
Super Smash Bros. Ultimate
Tatanga appears as a shield-type primary spirit that can be obtained in a Spirit Battle against Morton equipped with a Super Scope.