The Mimikyu GX (226 / 214) card can be found in the Lost Thunder set.
Recently sold 10 times and based on those sales is worth around £32.46.
Currently, there are 4 open listings for this card on ebay.
This card sells in the range of £20.09 to £44.83, making it quite volatile.
This Rare Rainbow card was illustrated by 5ban Graphics.
The fact that it is a GX card makes it one of the more valuable cards.