SQRTS6

Alright so there is a Trade with an Old Man in North Obsidia Ward (Sunkern for "Rare Pokemon"). It appears there are multiple Pokemon he can send back. Does anyone know the complete list? So far I've read you can get a Mime Jr, but I have only received a Carbink and a Cryogonal. The only listed Pokemon on the Capture Guide and Walkthrough is a Mime Jr. It's quite the mystery! Thanks