Pappy is Timmy's grandfather and father of Mr. Turner. He is the one who caused Timmy to have his signature buck tooth by letting him suck on his pacifier too much when he was a baby. He only appeared in The "Good Old Days!".
Pappy first met Timmy when he was a baby, while Pappy was supposed to be watching him he fell asleep, causing Timmy to develop buck teeth by sucking on a pacifier too much due to Pappy's short term memory loss at his age. Pappy then returned ten years later to babysit Timmy again.
Pappy has a large white beard, glasses, and he wears what resembles a Civil War-era American army uniform. He carries a cane to help him walk. Pappy generally despises the habits, music, and cartoons of younger generations. Pappy likes the cartoons of older generations and appears to have a great amount of knowledge about everything that happens in old cartoons.
When Pappy came to babysit Timmy, he was extremely boring and did not like all the younger people stuff Timmy was doing. However, a glimpse of Captain Green and the Eco-Teens led Pappy to complain about how watered down new cartoons are, and how the cartoons in his era were much more violent. Realizing that he and Pappy shared a common interest in cartoons, Timmy decided to explore this further. With the help of Timmy's fairies, he and Pappy were able to go on a fun adventure in 1930's Dimmsdale. Pappy then explained to Timmy all the things that would occur in old cartoons during the adventure. Pappy had such a great time that he eagerly tried to tell Mrs. Turner about it, who deemed that Pappy had gone senile and was no longer fit to babysit Timmy. It is unknown where his wife is. Pappy felt sad that he would no longer have fun with Timmy, but they decide to spend their last moment together with a little 1930's style dance.