Pokeballs have the tendency to be painful when thrown hard. They tend to cave faces in when thrown hard enough.
There's your hadoken motion right there.
News you can Use...s : use "includestage=0" in any chracter decleration to not include that chracter's stage. This can be handy when trying to have a pre-defined stage list based on games and such.
Now this might seem obvious, but you'd be amazed how long you can use MUGEN without knowing it.