From the Super Mario Wiki
Klevar is one of the seven Star Spirits in Paper Mario. He is the Star Spirit that Huff N. Puff guards.
He is young, and as his name implies he is very clever and always reads books. He holds a book under one arm. He has a bowtie, and rosey cheeks.
In Mario Party 5, Klevar explains the game's various modes.
Names in other languages
||From lista (clever) and estrella (star)
||From étoile (star)
||From "astro" (star) and "tutto" (everything), because in Mario Party 5 (the first game where his name was translated) he's a guide to everything