The Rattata (89 / 110) card can be found in the Legendary Collection set.
Recently sold 15 times and based on those sales is worth around £18.11.
Currently, there are 6 open listings for this card on ebay.
This card sells in the range of £11.53 to £24.69, making it quite stable.
This Common card was illustrated by Mitsuhiro Arita.