Come on, why would Pluto want to keep hanging out with the planets, the dwarf planet club is much bigger and cooler. And either way, pluto has a moon named Charon that's so big it's debated whether it should be called a moon or another dwarf planet...
At least, after being demoted to asteroid Ceres was re-promoted to Dwarf Planet. Imagine having once been called a planet and being considered an asteroid. Imagine being Pallas.