Darkwing Duck - Season 1 Episode 40 -

300 years ago, a pirate scourge sailed the seas, striking for truth and justice. That's right, believe it or not, that was a scourge of pirates! Darkwing Doubloon and his crew, Gosalyn, Stegmutt, Launchpad, and Gizmoduck have must battle the alleged pirate Negaduck and the Fearsome Four to keep them from making off with the king's jewels.