You're right, long ears.
2 seconds sound clip from The New Adventures of Winnie the Pooh - Pooh Skies / April Pooh (S3E5).
You can hear this line at 00:18:03.253 in the Blu-ray version of the TV Series.
Quote context
[...]
- I wonder if anyone else has been tricked.
- Help! Help! Don't just stand there. Get me down from here.
- Thank you. Now would someone mind telling me what's going on around here?
- The fool must be invisibibble.
- But if the April Fool is invisibibble, how shall we find him to ask him if he's scary or not?
- By being invisibibble ourselves.
- Have we found the April Fool yet?
- The only fool around here has stripes.
- I can't believe Tigger talked me into this.
[...]