Bill (Japanese: ソネザキマサキMasaki Sonezaki) is a Pokémon Researcher from the Goldenrod City in Johto, but resides in Cerulean City in Kanto.
Bill is a talented and famous inventor, who invented the original Pokémon Storage System and Time Capsule. People, including himself, call him a PokéManiac because of his large collection of both common and rare Pokémon. The first one he caught was an Abra; however, his favorite Pokémon are Eevee and its evolutions.
Bill also has several friends that share his interests in computer technology. One of them is Celio, his old friend from One Island in the Sevii Islands.
The Alexis Saga
He first appeared in On the Road Again! alongside Celio, both working on further compatability with the Storage Network they'd created. He'd requested Lexi find a Meteorite for him, in which she did so. Once she had acquired this for him, he revealed he'd be heading back to Kanto to finish the work.