Switched (Season 1 on Netflix)

Outcast student Zenko switches bodies with cute and popular Ayumi. No one believes Ayumi except her friend Kaga. Will Ayumi be able to get her perfect life back?
Who cares! It’s all about Amagase, the budgie. Amagase not only makes the credits, but appears in all 6 episodes of the show.

Amagase was formerly a man who switched bodies with his parakeet after losing all his money/family.Amagase makes an appearance when various characters switch bodies.
Amagase is clearly the star of the series.

Hopefully we will see more of Amagasi if Switched is granted a second season.