Question about Street Fighter and DBZ

[BumblebeeCody]

I dunno about copy but the Street Fighter characters are based/influenced from SO much Manga and Animes(and others).
There's a good Fighterpedia video on the origins of the Street Fighter cast and their early designs. I'd say that Shinku Hadouken is much closer to Kamaehamaeha than regular Hadouken.

So I wouldn't say copied but highly influenced.

As for the whole, training from a Sensei, it's a cliche story point. Very common.