Tryclyde, incorrectly spelled Triclyde in the game's credits, is a boss from Super Mario Bros. 2, and one of Wart's most powerful minions. He has the appearance of a three-headed Cobrat.
Tryclyde was fought in World 2-3. He shot fireballs at Mario, Luigi, Peach, and Toad, but they defeated him by throwing mushroom blocks at him. He took three hits before he was destroyed.
Another Tryclyde was fought in World 6-3. In this battle, any mushroom blocks thrown at him would fall down a pit, so if all were used up before he could be defeated, he would be unbeatable. To help guard against his fireballs, the player can stack blocks on the edge of the platform. He takes three hits like before.