A LOT of pigs appear naked in this episode.
At the end of She's the Toad Ed Bighead is wearing Rocko's shirt. To see this, look REALLY close at Ed.
Heffer: Say wee.
Heffer: Say wee...wee.
Filbert: Oh, okay. Wee-Wee!
Rocko: I know the secret of getting rid of the stage fright.
Filbert: You do? Please tell me!
Rocko: Just picture the audience...naked!
Filbert: I can't do it. It's way too disgusting.
Rocko: (looking at the audience) YUCK! Open mike night is a very dangerous night.
Filbert: Citizens of Conglom-O, repeat after me: Wee-Wee!
In the Episode, Rocko's Happy Vermin
, Rocko avoided stepping on a bug and he said he didn't want to hurt bugs. In The Lounge Singer
, though, he steps on some bugs on his way to Filbert's house.
In The Lounge Singer When Filbert starts singing "Come Crawl With Me" the piano is still playing even though he's the only one on the stage.