The Raikou (28 / 144) card can be found in the Skyridge set.
Recently sold 3 times and based on those sales is worth around £18.00.
Currently, there are 2 open listings for this card on ebay.
This card sells in the range of £8.55 to £27.45, making it quite stable.
This Rare card was illustrated by Mitsuhiro Arita.