That's the end of Darkwing Duck.
5 seconds sound clip from Darkwing Duck - Just Us Justice Ducks Part1 (S1E20).
You can hear this line at 00:22:02.961 in the DVD version of the TV Series.
Quote context
[...]
- I knew you wouldn't notice the enormous flag.
- Boys!
- Help.
- See ya next fall. Ha-ha-ha-ha.
- That's the end of Darkwing Duck.
- I hope this is enough money to get the power back to the hospital.
- Megavolt's running the power company?
[...]