Pinocchio - Schnozmo's long nose is likely designed after Pinocchio's long nose, as both are liars and Pinocchio' nose gets longer whenever he lies.
SpongeBob SquarePants - Schnozmo plays his nose like a flute, just like SpongeBob does, in the vacation scene.
Schnozmo says the phrase "Two words.." and then says something that is longer than such amount.
Somebody saying "Schnozmo" stole their earrings.
Schnozmo calling Timmy by some other name (e.g. Lorenzo, Fernando, Horacio etc.) and knocking on his head. Timmy also does this at the end of the episode.
In "The Gland Plan", it was established that Cosmo is an only child (which was why Timmy and Wanda had to get Anti-Cosmo's Fagiggly Gland for the operation). However this episode reveals that Cosmo does have a sibling.
When the waiter said the price Schnozmo had to pay, he said $14.75. On the receipt, it said $14.55.