Will you stop that? That's no fair tickling.
5 seconds sound clip from Darkwing Duck - Darkly Dawns the Duck: Part 2 (S01E01).
You can hear this line at 00:01:32.576 in the DVD version of the TV Series.
Quote context
[...]
- But it's hopeless. No one gets the drop on Dark... Oof!
- In a lightning move, Darkwing Duck turns the tables on the tiny te-te-terror till she...
- Will you stop that? That's no fair tickling.
- A radio. Let's have some tunes.
- Whoa! That's... not... a radio!
- Keen gear! This is some kind of training course, huh?
[...]