Alan (Japanese: アツオAtsuo) met Ash and friends while they were at Mt. Coronet.
While he was battling Ash, his Nosepass evolved into Probopass. His Probopass was stolen by Team Rocket and even if he managed to get it back, it still couldn't control itself. Still, Alan managed to break the device and Probopass re-gained its control.
Later, he is seen in a flashback, when he battled Fantina with his Probopass.
Alan's Nosepass evolved into a Probopass during the time Ash and his friends were with Alan near Mt. Coronet..