Yeah.. Simply a painting of Brock's Rhydon from Gym.. Challenge? I can't remember but I guess it is from the Gym Challenge set.
There is a huge fail on one of its eyes.. That red thingy.. It really made me mad and when I was trying to fix it it just got worse so I decided not to touch it anymore.
Quick little fact about Rhydon: Rhydon is actually the first Pokemon ever created by the Pokemon company. In honor of that there is a statue of Rhydon in every gym in all the Pokemon games.
Originally drawn by Ken Sugimori. Hope you like my version!