Even if you think it's well known, give it a shot!
-A regular "Jynx" is impossible to get in Pokemon RBY without the aid of cheats or glitching. The only way to acquire one is through an in-game trade in Cerulean City. The Jynx you receive is named Lola. -You can get a level 3 Electrode in RBY/FRLG through an in-game trade. A man in Cinnabar will ask for a Raichu. If you catch a level 3 Pikachu in Viridian Forest, evolve it with a Thunder Stone, and trade it with the man, you'll acquire a level 3 Electrode. At 27 levels under its normal evolution point, it's one of the most under-leveled Pokemon you can legitly get in the Pokemon series.
Same deal as Jynx but with Farfetch'd until Yellow. It's name? Dux.
Eevee seems to be native to the Unova region, as it has never been seen to be truly wild in any other gen. It appeared in a garden in D/P/PT, but the Pokemon who appeared there were imported by the mansions butlers to make his masters lies about what lives in his garden seem like the truth.
On 12/02/12 I said I wouldn't change this until something impossible happened. Now, Earthbound just got re-released in the US.