From the Super Mario Wiki
Frog Pirates are a species of frog in Super Mario World 2: Yoshi's Island and Yoshi's Island: Super Mario Advance 3. They live in the swamps and wetlands of Yoshi's Island and are found primarily in the third World of the game. If a Yoshi comes too close to one, it will lash out its tongue and try to steal Baby Mario. Stepping on its head only disables it for a moment, so Yoshi should instead try to throw an Egg at the frog or swallow it. Spitting out a Frog Pirate will only make it fall off the screen, enabling it to respawn later.
The World 3 mid-boss Prince Froggy is based on this enemy, and unlike other bosses in the game, bears no visible differences to the enemy he is based on. In the Japanese version of the game, Prince Froggy and Frog Pirates have the same name (Gerogēro).
In Yoshi's Island DS, there are creatures called Fleepers that are reminiscent of Frog Pirates in a way, but look and act differently.
Names in other languages
|Onomatopoeia for the sound a frog makes.
||Based on Prince Froggy's German name, Börk Börk