The Steelix (35 / 147) card can be found in the Aquapolis set.
Recently sold 1 times and based on those sales is worth around £42.38.
Currently, there are 3 open listings for this card on ebay.
This card sells in the range of £42.38 to £42.38, making it very stable.
This Rare card was illustrated by Hajime Kusajima.