|Anime debut||Yu-Gi-Oh! SEVENS episode 0099: "Wonderful Jurassic"|
Professor Diggs's grandfather is a character in the Yu-Gi-Oh! SEVENS anime.
Diggs's grandfather is an old man with weathered skin, brown-eyes and grey hair that sticks out in a tuft from under his hat and in a long beard, with two tuck like points jutting from his sideburns. He wears small rectangular spectacles on his nose and outdoors clothing; a cream-colored T-shirt, large black gloves and boots, an orange vest and pants held up with a black belt with a silver buckle, and a tan wide-brimmed hat with a brown band at the base.
Diggs and his grandfather found a fossil coprolite at the beach, and Diggs's grandfather explained to Diggs what it was and told him to hold it to his ear. Diggs claimed he could hear a dinosaur toilet, and his grandfather asked him if it was "Jurassic".
- Yu-Gi-Oh! SEVENS episode 0099: "Wonderful Jurassic"