I didn't know what i was doing when I first started this game 2 months back so i sold Tea & Mako's UR's. Is there a way to get them back (besides spending weeks painfully collecting small amounts of keys to farm the characters from the gate)?
THANK YOU so much anonymous. "Exchange" is a perfect suggestion! I didn't think of it myself.
There is currently no way to get them back. Never sell any card unless you got more than 3 copies. I made the same mistake long ago and it's more painful than yours, converted my Dark Magic Attack.
Tea and Mako's UR so I am assuming Dark Magic Girl and Legendary Fisherman. If you are after the missions for summoning them, get the card "Exchange" from Joey and ask a friend to help you out. It counts as long as you summon them from your hand.