Kansas_Rocks!
Awesomeness Trainer
Aside from a few gameplay explanations, how about why no Gen 1 Pokémon got the Dark type in Gen 2?
- When Gen 6 came around, some returning Pokémon got the new Fairy type, like Clefairy.
- When Gen 2 came around, some returning Pokémon got the new Steel type, like Magnemite.
- When Gen 2 also came around, ONLY the move Bite changed from Normal to Dark. No returning Pokémon got the Dark type, at the time.
The two that gained a steel typing pretty much had to be due to their physiology. They were literally made of metal. There really isn't anything from the first gen that screamed dark, except maybe Arbok. There was nothing that absolutely needed to be dark like Magnemite and Magneton needed to be steel.