The Mega Lopunny & Jigglypuff GX (226 / 236) card can be found in the Cosmic Eclipse set.
Recently sold 13 times and based on those sales is worth around £46.53.
Currently, there are 16 open listings for this card on ebay.
This card sells in the range of £27.85 to £65.21, making it quite volatile.
This Rare Ultra card was illustrated by Shibuzoh..
The fact that it is a GX card makes it one of the more valuable cards.