The Magikarp (75 / 144) card can be found in the Skyridge set.
Recently sold 4 times and based on those sales is worth around £3.95.
Currently, there is 1 open listing for this card on ebay.
This card sells in the range of £1.70 to £6.20, making it very stable.
This Common card was illustrated by Keiko Fukuyama.