From Bulbapedia, the community-driven Pokémon encyclopedia.
Grandpa is a creepy mad scientist in the romantic manga series Pokémon PiPiPi Adventure, also known as Magical Pokemon Journey. He's a genius at making all sorts of things, such as love potions, magic mirrors, and a magical suit that will protect its wearer from harm. He sent Hazel out to catch Pokémon for him so that he could impress girls, but she hasn't caught a thing.
Grandpa is married to Ginger and is the grandfather of Coconut.