Professor's Research (Professor Oak) Pokmon TCG Pocket Card Holo Rare, English Professor's Research [Professor Oak] Pokmon TCG Cards CGC 10 1999 Base Set Imposter Professor Oak 73 102 RARE Pokemon Card GPC 10 Professor Oak Trainer #88 1999 Original Series Base Set PSA: Professor is the rarest card in the set : r PTCGP This Professor Oak card might be broken.. I mean it's basically a pot of greed! : r PTCGP Professor Oak's New Theory Reverse HeartGold & SoulSilver Pokmon card 101 123 Price & Rarity