The Empoleon V (146 / 163) card can be found in the Battle Styles set.
Recently sold 11 times and based on those sales is worth around £35.00.
Currently, there are 36 open listings for this card on ebay.
This card sells in the range of £28.95 to £41.05, making it quite stable.
This Rare Holo V card was illustrated by chibi.
The fact that it is a V card makes it one of the more valuable cards.