>>29872034Fusions
Once per battle, if the Pokemon you have on the field is fully evolved, you can in a sense "sacrifice" a member of your party, which gets fused into the Pokemon you have out. They don't normally create a new design (that'd be way too much work for the designers), but rather the main Pokemon takes on the color scheme of the secondary Pokemon, as well as their ability, half of their typing, a totem-style size boost and a stat boost based on the secondary Pokemon's EV yield. For example:
>Charizard on the field>"Fuse" Charizard with a sturdy Geodude in party>Geodude-Charizard is a Charizard but bigger with a grey color scheme, Sturdy, and a big boost in base defense>Fire/Rock typeFusions and mega-evolutions are locked: you can only activate one in a battle, not both. For certain pairs of Pokemon they would do brand-new designs for fusions instead of color swaps, such as with box legendaries, gen 1 starter fusions, Sawk/Throh, Beautifly/Dustox, Plusle/Minun and so on.
Shit would be broken as fuck but I'd play it.