What you do is trade your starter to another game, resart, and get a different starter and do it again. You can also use action replay but you'll have to wait a while because Pokemon Black & White are new games.
Tepig, Oshawott, Snivy
You can't, but you can get them all through the global trading system or gts.
Starters are not given in the form of eggs.
All 3 Unova and Johto starters can be found in Pokémon Sun & Moon!
one of the full evoulutions of the starters so i'd pick snivy.
You can't buy other starters. Trade them over from friends or gts.
unova is all
The starter Pokemon in the Unova region are named Snivy, the Grass-type starter, Tepig, the Fire-type starter, and Oshawott, the Water-type starter.
Snivy:strong at start weak at end. Tepig:weak at start strong at end. Odhawott:strong at start strong at end. i chose oshawott but you don't have to and this isn't an answer its something to help you choose...
Amusing that you are referring to the fire-type starter Pokemon for new trainers in each region, then the answer is: Charmander (Kanto) Cyndaquill (Johto) Torchic (Hoenn) Chimchar (Sinnoh) Tepig (Unova)
they are in the unova region
Black and White are the games. Best Wishes is the anime series that Ash is in Unova. He doesn't pick a starter, since he already got his starter (Pikachu) from Proffesor Oak. He catches all the starters though.