A rich couple is looking to adopt a puppy for their son (they were originally going to invest in Katrina's condominiums, but Holly won them over with a sales pitch for her pound instead). So, the main gang is taken to their mansion, and it turns out to be such a fabulously wealth and lavish place that Nose Marie immediately wants to be adopted by this couple...but then she wonders, what if they don't pick her? She'd just die!...so what do the other puppies do? They offer to intentionally sabotage their own chances of being adopted so the rich couple can't pick anyone but Nose Marie! Howler offers to roll over and play dead, Bright Eyes offers to pretend she has fleas, and Whopper offers to eat too much! (We don't get to see what Cooler offers because the scene changes to somewhere else after Whopper.) It doesn't work out anyway, though, because Katrina has Catgut and a bunch of cats wreck the place and blame it on the puppies. But give Nose Marie's friends credit for trying!
Newcomer Buster is accused of causing the damages to the rich couple's house because of his tendency to break things, but after the rich couple find out that it was really Katrina's fault that their house was wrecked, Buster ends up being the dog that gets adopted, and he even manages to get his new owner to crack a smile.
Near the end of "Wagga Wagga", Cooler's old flame Penelope reveals that she's started a family with another dog. She asks Cooler that he hopes he understands. Cooler replies that she shouldn't have had to be troubled with asking the Pound Puppies to rescue her family, making it clear that he isn't jealous about Penelope having puppies with another dog.
The ending of "Happy Howlidays", where everyone Holly and the Pound Puppies gave presents to repay their kindness by giving them the money they need to keep the Puppy Pound in business.
Whopper's hero Biff Barker getting the courage he needs to save the Pound Puppies from Katrina and Brattina in "Ghost Hounders".