The Dialga EX (122 / 119) card can be found in the Phantom Forces set.
Recently sold 13 times and based on those sales is worth around £96.94.
Currently, there are 6 open listings for this card on ebay.
This card sells in the range of £24.68 to £169.20, making it highly volatile.
This Rare Secret card was illustrated by 5ban Graphics.
The fact that it is a EX card makes it one of the more valuable cards.