He isn't real.
1 seconds sound clip from the The First Easter Rabbit (1976) movie soundboard.
You can hear this line at 00:04:38.246 in the Blu-ray version of the movie.
Quote context
[...]
- You've now met Spats, Whiskers, and Flops, 3 of the slickest con bunnies around.
- Alas, my men. Behold that silly-looking rabbit sitting over there.
- Hey, look, he's strange. He hasn't got any hind legs.
- His odor is unsniffable. Undetectable.
- Poor stuffy. He knew he wasn't real like the other rabbits. And that made him very unhappy.
- But he was Glinda's favorite toy, and as the months passed, so did his sadness because he was loved.
- But one day, something happened that was to affect everybody's life. Little Glinda took ill.
- I'm afraid it's scarlet fever.
[...]