Just for the heck of it, here's "Wunnerful! Wunnerful!" in case anyone recognizes any other Sven soundbites from it, although I wouldn't be surprised if "Turn off the bubble machine..." and the cards and letters song are the only two sourced from there.
Also, I'm thinking of going through...
Would that Dale line be "It's got a good beat - I could kill bugs to it"? 'Cause that's the only clip I can think of that's used on the show that mentions killing bugs.
There's another Scooby clip I know of that's used on the show quite frequently: "Rank you! Rank you! Rank you!" but I don't...
Edited since I found another "Animaniacs" clip used on the show:
"Yahooie! My man!" from "Moon Over Minerva".
Also, I found out the episode Dot's "He'd better switch to decaf" was from, and just remembered a Yakko clip used on the show but I can't remember the episode it was excerpted from.