This Card Maker for Pokemon app supports multiple stages of Poke card: EX, GX, V, Vmax, VGold (from Basic, Stage 1, or Stage 2, Mega, Legendary come with your own special rules)
Mostly you use cards like this to draw attention away from your other cards in a cost effective and tempo effective manner
It can't be Normal or Special Summoned while its owner has another monster, which could make it a dead draw at a bad time
They include promo cards with the Battle Academy logo and numbering, which are not legal for professional tournaments
Your proposal makes sense from a collecting standpoint, but it results in issues like there being only one electric holo in Base and no psychic holos in Jungle