Tehee Butterfly

Tehee Butterflies (also spelled Teehee Butterflies and called Tehee Trampolines in the context of jumping on them as springboards) are flying spherical insects that appear in Yoshi's Story and the Super Mario-kun manga. They fly around and change color from pink to blue. Eating a pink one restores a Yoshi's health, but eating a blue one depletes it due to bitterness, as indicated by a Message Block.

In Super Mario-kun, the Baby Yoshis set out to find the legendary Tehee Butterfly so they can use its fabled restorative after Mario becomes exhausted. It seems harmless at first, but as the Yoshis attempt to catch it, it turns vicious and retaliates. It repeatedly plays cruel pranks on the Yoshis and giggles afterwards. After Green Yoshi gets the upper hand and defeats the Tehee Butterfly, the Yoshis feed it to Mario. However, just before he eats it, the butterfly turns blue and has adverse effects.

The name of this enemy comes from the noise it makes when it changes colors.

Profiles and statistics
''The legendary butterfly that chirps, "Tehee, Tehee." If you want to eat it, eat it when it looks healthy.''
 * Shogakukan guide:「ウフフ、ウフフ」と鳴く伝説のちょうちょ. 食べるなら、顔色がいいときに.