The Magneton (H18) card can be found in the Skyridge set.
Recently sold 2 times and based on those sales is worth around £48.78.
Currently, there is 1 open listing for this card on ebay.
This card sells in the range of £41.58 to £55.98, making it quite stable.
This Rare Holo card was illustrated by Hajime Kusajima.