Beginning the QuestEdit
Okay, to start this quest you must talk to Professor Chuckles(npc) in his lab, in the South East Corner of the map. He is down the hall. Talk to him and he will explain that the pokemon he was going to give you was misplaced and sold to the store.
You head on to the store in the South West of the map (next to an Arbok) and you talk to the Merchant. He says team rocket stole them and you must head again to the South East part of the map.
Look for a Team Rocket member and talk to him. After that, talk to Professor Chuckles.