The Mega Sableye & Tyranitar GX (226 / 236) card can be found in the Unified Minds set.
Recently sold 7 times and based on those sales is worth around £120.00.
Currently, there are 6 open listings for this card on ebay.
This card sells in the range of £82.43 to £157.57, making it highly volatile.
This Rare Ultra card was illustrated by chibi.
The fact that it is a GX card makes it one of the more valuable cards.