The Lucario (78 / 135) card can be found in the Plasma Storm set.
Recently sold 3 times and based on those sales is worth around £2.49.
Currently, there are 4 open listings for this card on ebay.
This card sells in the range of £1.22 to £3.76, making it very stable.
This Rare Holo card was illustrated by Satoshi Shirai.