Its already decent as a two-mana, two-power unblockable creature, but in a format overloaded with cheap noncreature spells (and this includes Modern) its just about casting Ponder and Bolt, its about using Mishras Bauble and other such broken cards to set up a copied huge spell, and Im here for that
As far as their aesthetic, Prism Star cards had black borders, a silver border under the Pokmon's illustration box, and a huge, holographic Prism Star symbol on the text box
Then you can place that casted thing on the bottom of your library to draw again next turn
This gives you time to summon some powerful cards from your deck
Mega Pinsir, for example, can be played directly as a Basic Pokmon card, and Mega Blaziken is evolved atop a Combusken
"GB Rytiano" is another powerful no-fusion GB that I created thinking about giving consistency to the deck and not depending so much on its fusions