Indeed I have.
Though I'm still learning ActionScripting. So for the time being I'm splitting the project in two:
1) Radical Dreamers: Side scrolling platform style (This will be my first attempt till I get the second one right)
2) Chrono SSB: This will be the final project once the game engine is completed and I've got all the sprites done.
At the moment I'm trying to make MUGEN style Kid sprites from scratch (and it's pretty difficult). Then I'll make Serge and Magil done. Once they're done, I'll start making CC and CT sprites like that and add to RD project as expansions. Once all of them are done, I shall release Chrono SSB.
Those who know how to create sprites for MUGEN style, feel free to assist.