Yakko Warner is the main protagonist in Animaniacs and
the oldest of the Warner siblings, because in an interview with producer Tom Ruegger, he stated that Yakko is biologically 14 years old.
Size Growth Edit
- In episode 46a: "Turkey Jerky", a pilgrim was trying to take the Waeners' pet turkey. At one point, the pilgrim shrinks and Yakko looks huge.
Muscle Growth Edit
- In episode 47: Video Review/When Mice Ruled the Earth, in the musical segment "Video Revue", Yakko briefly gains muscle when mentioning Sylvester Stallone.