In "Mr. Stenchy", Plorgonar becomes the one true place for Experiment 254 (Mr. Stenchy) because, unlike Earth, his noxious odor is considered appealing to the inhabitants on Plorgonar, as Pleakley himself was not repulsed by Mr. Stenchy's stink. It is also shown that Plorgonarians live in structures shaped like their heads.
In "Fibber", Pleakley receives a call from his mother who has been badgering her son about finding a wife, and even tells him that she has selected a perfect bride on his home planet. When Pleakey's family later visits him to see his sudden engagement (which he had lied about) Pleakley's mother mentions that Wendy, her son's first name, means "brave warrior" on Plorgonar (his brother Bertley wanted that name).
In "Slugger", Pleakley wins at basketball and mentions that Earth basketball is virtually identical to Priznolaprack, a similar game on Plorgonar of which he was a champion player.