The Blastoise (137 / 135) card can be found in the Plasma Storm set.
Recently sold 11 times and based on those sales is worth around £103.79.
Currently, there are 5 open listings for this card on ebay.
This card sells in the range of £73.46 to £134.12, making it highly volatile.
This Rare Secret card was illustrated by Ayaka Yoshida.