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Someday I'd like to make a romhack/fangame that restores the betamons and makes getting them feasible and in like with their supposed origin.
Like evolving Porygon 2 while holding a different disc gets you the lion version.
Breeding Tangela while holding a Rosebud item (or something) gets you that alternate pre-evolution.
Maybe you find a sealed off area where prehistoric Pokémon still live in their unchanged forms like Draco-, Arcto-, -zolt, -vish have their regular bodies, and Rampardos isn't a balloon, and Genesect isn't a robot, and you can catch the Original Dragon, etc.
Even something like making Beta-Scizor a split evolution of Scyther where it reaches a certain level while not holding a Metal Coat.