Mushroom swiss hamburger.
Grass/Flying. The bottom bun is a thick stem-like body that leads up into the burger itself, which is the mushroom cap. It has a sort of hair/hat/whatever that looks like a slice of cheese. The top bun is represented by a cloud hat, like Drifblim's but different.
Its eyes are on the burger/cap, and its mouth isn't visible.
It's encountered around level 18, and it has sweet scent, bullet seed, growth, and synthesis.
Very high HP, good-but-not-great Def and Attack, and lacking in all other stats.