The Pikachu (BW54) card can be found in the Bw Black Star Promos set.
Recently sold 2 times and based on those sales is worth around £11.66.
Currently, there are 3 open listings for this card on ebay.
This card sells in the range of £7.50 to £15.82, making it stable.
This Promo card was illustrated by 5ban Graphics.