How to create a game like Super Smash Flash 2 please ? =3
Dedication, commitment and a whole lot of love.
Learning to develop a flash game is a lengthy process, especially one of this level.
I'd recommend doing a bit of research on what software you'll need first, then look up some tutorials on animation, coding etc.
All the best to you if you are willing to give it a go yourself but don't expect to develop a game overnight. Could possibly take years of experience before you can even develop a game half as good as this.