The Arceus V (166 / 172) card can be found in the Brilliant Stars set.
Recently sold 28 times and based on those sales is worth around £36.77.
Currently, there are 6 open listings for this card on ebay.
This card sells in the range of £27.85 to £45.69, making it quite stable.
This is a Rare Ultra card.
The fact that it is a V card makes it one of the more valuable cards.