The Bird Pokemon are usable - ahem - projectiles in Angry Birds: Pokemon.
Pidgeotto pushes blocks and pigs away from it.
Delibird is a variation of both Pidgeotto and Ice Bird. Surfaces it touches become ice, and it can push blocks and pigs away from it.
Wingull is a variation of Lazer Bird. It is slightly more powerful.
Staraptor is a variation of Blu. It is much more powerful.
Pidove is a variation of Pidgeotto. It is slightly less powerful.
Farfetch'd is a variation of Pidove. Though slightly weaker, the animation and the tactics are different. Specifically, it spins around using its garlic.