The two Doric servants Imbecilus and Stupides are based of the comedic duo Oliver Hardy and Stan Laurel respectively.
The Trojan spoiled brat Petuna was voiced by Tress MacNeille who also voiced a similarly-named/voiced/spoiled character Petaluma from Season 6's "Smurfette's Flower."
While Grandpa, Greedy, and Snappy appeared in the title card for "Trojan Smurfs," they are no where to be seen in this episode.