Penny Pig came into Mopatop's Shop in the episode "Wind". Right after Mopatop asks her what they can help her with she begins to sing about how she fell into a puddle, in her fine dress, on the way to a party and now her dress are very wet. Luckily for her Puppyduck had earlier let the wind out of it's container and it dries her dress. She decide to take it home with her in case she falls in another puddle. However Mopatop tells her that they have not been able to catch the wind, Penney opens her purse and traps the wind, after all she are good to capture things.
Her name are not mentioned in the episode, but are specified in the credits. The same puppet have been used in various roles on the show.