The Dialga (SL2) card can be found in the Call of Legends set.
Recently sold 8 times and based on those sales is worth around £31.42.
Currently, there are 14 open listings for this card on ebay.
This card sells in the range of £14.90 to £47.94, making it quite volatile.
This Rare Holo card was illustrated by Ayaka Yoshida.