The Mewtwo (144 / 146) card can be found in the Legends Awakened set.
Recently sold 8 times and based on those sales is worth around £29.58.
Currently, there are 8 open listings for this card on ebay.
This card sells in the range of £13.18 to £45.98, making it quite volatile.
This Rare Holo Lv X card was illustrated by Shizurow.