I have a theory about Chansey but need to fact check first. Can someone knowledgeable about early Sugimori art confirm these are the only known Sugimori arts?
Game boy art:

Rare, on non - TCG printed material:

Alternative early art widely used outside of TCG:

Carddass (uncredited but using assumption to be Sugimori):

Neo trophies (personalized holo has Chansey slightly higher in the artwork which reveals more of left side while covering right):


Calendar:

Vol 0.:

Newer video game art:
