Bart

Bart (Pocket Paradise)
The owner of Bart's Exchange in the village, Bart will open his shop once you reach level 4. There you can purchase tinker tickets for 100 chocolate coins each, which you can use to mark items for Bart to transform.

Other Info.

 * His full name is Bartholomew, and he prefers to refer to his title as "a transmorgrifible item technician"