It belongs to my old nemesis Quackerjack.
5 seconds sound clip from Darkwing Duck - Toys Czar Us (S1E32).
You can hear this line at 00:01:53.972 in the DVD version of the TV Series.
Quote context
[...]
- All I need is one singular clue to the strange disappearance of your toys.
- Don't bother Darkwing Duck with questions on dental hygiene, man.
- Ah-ha! I'd know this logo anywhere.
- It belongs to my old nemesis Quackerjack.
- No. Another crash. It's my sidekick.
- Hey, DW, they want you at Gos's school for a parent-teacher conference.
- This is the third time Gosalyn's been caught playing baseball in the halls, Mr. Mallard.
- Do you know what that means?
[...]