Question about identifying 1996 Glossy vs Non-Glossy Japanese Promo cards

[majesticxsloth]

I find the easiest way is to shine light on front corners of the cards. The glossy corocoro seem to catch the light around the edges while the non glossy remain flat.

This article has a lot of tips too for the pikachu

@prochaos

Below is to show the obvious gloss and lack of gloss on all 3