The Kyogre ex (94 / 101) card can be found in the Hidden Legends set.
Recently sold 7 times and based on those sales is worth around £23.29.
Currently, there are 10 open listings for this card on ebay.
This card sells in the range of £15.88 to £30.70, making it quite stable.
This Rare Holo Ex card was illustrated by Hikaru Koike.
The fact that it is a EX card makes it one of the more valuable cards.