The Mewtwo (24 / 110) card can be found in the Holon Phantoms set.
Recently sold 5 times and based on those sales is worth around £40.95.
Currently, there are 2 open listings for this card on ebay.
This card sells in the range of £22.41 to £59.49, making it quite volatile.
This Rare card was illustrated by Ryo Ueda.