[Questions] Charizard G Lv. X 143/147 Supreme Victors card

I have a non holo version of this card w/ yellow border. Being told this is not an authentic card, but know that it came from a pack or store bought boxed set. Does anyone have concrete knowledge that a non holo version of this card exists or doesn't? Thanks for your help

Definitely sounds fake. Fake boosters/boxes are sold in stores too (especially dollar discount stores, flea markets, etc.). The fonts are usually off on these cards and the Energy icons rendered a little differently, so compare your card to images of the real thing online and you may notice even more differences.