Possibly Silver. For some reason I like that douche. Maybe because... I don't know, Lance gives him a good lessons?
In the manga: SILVER IS MOI FAVVVVVVVV OMGOMG
He is... so cool, si. His history and how he escapes with Green, and still working with her, and he's more of a cool and calm character in contrary to the other mupslap of a trainer. And the way he steals off the Totodile... O-O
Silver is the son of Giovanni... I cried when I heard that. That explains everything, yes? (Apart from his hair colour)