This was a silly idea I had. I don't know how many I'll do but I kind of like the idea?
I don't keep up with the Pokemon card game, so I don't know if these are balanced or even if the rules make sense. My thought was you can play a Doomed Pokemon as a normal Pokemon. They don't have any attacks. If you play a Swallow Pokemon you can attach the Doomed Pokemon to the Swallow Pokemon and use it as a kind of health potion. There's an advantage to caring about weaknesses because the Doomed Pokemon will digest twice as fast inside of Pokemon that it's weak to. It's still a Pokemon so you can still attach energy cards to it or use Potions, and if it faints your opponent still gets a prize. :3
If your Swallow Pokemon faints, you leave the Doomed Pokemon in play. Different Pokemon have different effects when Swallow Pokemon faint or when Doomed Pokemon get digested :3