If you've already bought your capturing weapons (you have to defeat the enemy with the weapon to capture it) then when you've captured enough he will give you the items, If you want to see where your at go to fight monsters and it will let you see how many of the monsters you have captured.
(Another side note, don't try to take on the creatures he makes until you have some ultimate weapons and do some serious leveling up.) <img src="/images/graemlins/wink.gif" alt="" />
