The Squirtle (64 / 100) card can be found in the Crystal Guardians set.
Recently sold 4 times and based on those sales is worth around £12.68.
Currently, there are 5 open listings for this card on ebay.
This card sells in the range of £8.38 to £16.98, making it stable.
This Common card was illustrated by Hajime Kusajima.