Basically just add a mob to the db called some thing like "Pet leveler" then make its level -1 and its hp 10 or so and make it any skin etc with no stats then make a room called "Pet leveling room" (maybe useing kt0002) or something like that and add it to the Mongen so it spawns allot then make an npc to teleport the charachter there and then your done.
/Miles