There are only two ways to get a Cyndaquil in Pokemon Black/White, and neither of these ways lie withi tall grass (can't be found naturally in the wild).
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I have a stoutland and its my favorite non legendary Pokemon but Reshiram and Zekrom both are the strongest Pokemon on black and white. This is the link to see the srongest and fastest ETC.
Nowhere , you see, Eevee is not in the new one where black and white takes place. Eevee is in the Kanto region so it's not in Black and White.
to get a 2nd master ball trade with 50 diffrent people and go see a man in black in the castela pokemon center
Cyndaquil- starter Pokemon obtained in the beginning of the game is a fire type more fire types are seen later in the game as you go such as Vulpix, please pay attention to what Pokemon you see and check your Pokedex.
Klink and Blitzle can both learn Charge, but he specifically wants to see one from another universe, ie, one traded from Pokemon White.