"Flat Tired" is an episode of Garfield and Friends. It originally aired on September 29, 1990.
Odie tries to escape unsuccessfully. The witch puts him into a cage and turns him into a gerbil. Next, she decides to make a gerbil sandwich from Odie. The director eventually convinces Garfield to save Odie. While the witch is preparing the ingredients for her sandwich, Garfield comes to the door, disguised as a mailman, and presents her with a large box, and then walks off. The witch sets the box onto the table. Garfield pops out of the box, and uses the magic wand to turn the witch into a bird, which flies away. Garfield turns Odie back into a dog, and they walk home. Odie asks Garfield how he got inside the box, to which Garfield responds by saying, "Hey, don't ask me, it's your cartoon".
Witch: I hate little doggies. So, I'll turn you into a toad. No, worse...a snake. No, even worse. I'll turn you into the most unspeakable, disgusting creature in the world!
Garfield: She's gonna turn Odie into a Top 40 disc jockey.
[Garfield presents the witch with a box]
Witch: Oh, for me? Thank you. Come back next time, and I'll turn you into an aardvark!