Does this sound like a good game idea?

sounds like u have some ideas but you still have a lot of work to do. in a game, there are other important things, like gameplay, storyline and even graphics and you cant just copy everything from Mario & Sonic. anyway, im sure that youll figure these things out; if you havent already ^^. in spite of all these, i advise you to try something else, to use an idea of your own and not to 'improve' another game. in any case, you have my support and im sure youll do a grat job :))