Gimmick, how about he has in his wallet a pic of all his family and promised not to swear to them. So every time he does, he pulls out the wallet, pics fall out "I'm sorry Betty!" ect.
How about Tracy's been sent to see him to pick up some stuff for Oak...
Team Rocket. Have Jessie and James posing as child workers at the next door child day care center. Heheheheh, hillarious.