@bullados: Okay. So for serious suggestions about using the VG color coding, see my previous post.
For those (like myself) that want Dual-Type Pokémon, I think it can be done but
not alongside (or not easily) along side another "special" mechanic. See how Team Plasma cards were done? I think that has to be done with Dual-Type Pokémon (were they to be introduced) to keep the game accessible to younger players; different color border, reminder text in upper right hand corner of card art, extra symbol in background of text.
Of course, if other mechanics are revised (like having multiple Weaknesses and Resistances on cards in general instead of just special cases) then we might be able to handle it by blending the Energy Types (half and half, checkerboard, swirl, or maybe some other pattern) and clearly having both Types depicted in the "Type" corner.
Well my question is, if they do end up making a dragon and fairy energy, will prism work for them? I mean, there were no energies of that type when it came out... So... Idk...
Given historical precedent, if a new "Type" of Energy is created, then a card that provides "every Type of Energy" or "your choice of Energy Type" or something to that effect will provide/will be able to provide the new type. This already happened with
Rainbow Energy, one of the predecessors of
Prism Energy:
Rainbow Energy was originally released in
Team Rocket, the fourth (fifth counting our first reprint set,
Base Set 2) set released but provided :dark: and :metal: Energy as soon as we got a ruling on that (which I believe was before the next set after those Energies first came to be).