Burt the Bashful

"Fine! Burt, hitch up your trousers and GO BUST UP THAT YOSHI!"

- Kamek

Burt the Bashful, also spelled Bert the Bashful, is the first mid-boss seen in Super Mario World 2: Yoshi's Island; he is found in World 1-4, Burt the Bashful's Fort. At the end of the fort, Yellow Yoshi encounters a normal Burt, which Kamek grows to a massive size, turning it into Burt the Bashful. To defeat him, Yellow Yoshi must hit him with eggs six times; with each hit, Burt's pants continue to fall off. When he is defeated, his pants entirely fall off and, ashamed, he turns red, eventually imploding. While Burt does not appear in Yoshi's Island DS, the mid-bosses of World 1, the Burt Brothers, are based on him. He also cameos in the beginning, alongside Super Mario World 2: Yoshi's Island's castle bosses and Tap-Tap the Red Nose. Burt the Bashful also appears in Super Smash Bros. Brawl as a sticker.

Burt the Bashful later appears in Yoshi's Woolly World as the boss of World 1 in World 1-8, Burt the Bashful's Castle. Here, Burt has three phases. First, he jumps as in Yoshi's Island. He occasionally summons two Shy Guys as ammos to try to bust up Yoshi. To hurt Burt, Yoshi must first hit him with a yarn ball to stun him, then unravel his pants at the string. For the second phase, he gets two ball look-alikes, which jump around, threatening Yoshi. During his final phase, he gets a third and fourth ball and summons three Shy Guys. Once Burt is entirely naked, the battle is completed. In volume 14 of the Super Mario-Kun, the volume based on Super Mario World 2: Yoshi's Island, Burt the Bashful is the first boss Mario, Luigi, and Yoshi encounter. He bounces around, smashing Mario in the process. Yoshi also attacks and ends up failing. An Egg-Plant assists them, but the Yoshi Eggs simply bounce off Burt. Finally, Mario, Luigi, and Yoshi grab and pull down Burt's pants, revealing his genitals. Ashamed, he shrinks and starts flying off as a deflated balloon, causing havoc to Mario and Luigi.

Trivia

 * Burt's sprites depict him differently from his artwork; notably, he has one curled hair in his sprites, but two drooping hairs in his artwork. Said artwork is reused for the Burt Brothers, and the same inconsistency applies with them.
 * Burt the Bashful makes a cameo appearance in the Nintendo Monopoly.
 * Not including Baby Bowser, Burt the Bashful is one of the only two bosses from Super Mario World 2: Yoshi's Island that make an appearance in Yoshi's Woolly World, the other being Naval Piranha.
 * In Yoshi's Woolly World, not including Baby Bowser's second form, Burt the Bashful is the only boss that doesn't need to be Ground Pounded to be defeated.