Right now, there is no demo.
Zekrom (the black dragon) is found in Pokemon White.
HM Waterfall can be found on Route 18 in Pokemon Black and White.
Poochyena is not found in Pokemon Black Version. It is found on Route 9 in Pokemon White Version, however.
Eevee cannot be found in pokemon black or white, and must be traded to be obtained.
Trade it from White. It is found in White Forest
It can only be found in White Forest which is only available in Pokemon White. But you transfer it to Pokemon Black or trade for one.
You can trade the DS Pokemon games onto Pokemon Black and White when you have the national pokedex and have found sort of the pal park in black and white.
It can be found in the Relic Castle in Pokemon Black Or White
Do you mean Volotos? You can't catch it on Pokemon Black, since it can only be found on Pokemon White.
Dwebble can be found in Route 18 and the Desert Resort.
Trade from white, can be found in white forest
Soloisis is not found in Black. You must trade it from White