Aha! Of course nobody was there, and nobody is who pilfered Piglet's Pooh picture.
7 seconds sound clip from The New Adventures of Winnie the Pooh - Tigger Got Your Tongue? / A Bird in the Hand (S3E10).
You can hear this line at 00:02:09.832 in the Blu-ray version of the TV Series.
Quote context
[...]
- It's brilliant, genius. Looks like polar bears eating marshmallows in a snowstorm.
- Oh, but it's not supposed to be polar bears. It was a picture of Pooh.
- It's true. I was there. And now I'm... gone. Aren't I?
- Yes. And nobody at all was around.
- Aha! Of course nobody was there, and nobody is who pilfered Piglet's Pooh picture.
- It was?
- And nobody knows nobodies like I know nobodies. Come on. Let's find us that nobody.
- Well, Tigger, how shall we catch him if we can't see him?
- That's easy. Hoo hoo hoo! You got to sniff him out.
- Topeka!
[...]