http://www.savefile.com/files/2353552
Its a link to my Hack Super Ninja Bros, It isnt finished, but it does have you playing as a ninja trying to save the princess from a bunch of pirate goombas, turtles and Skulls.
Here are some screens.
The Title(To be changed later)
Oh No, A pirate Goomba!
Ninja Stars make you big.
Fire Flowers remain unchanged.
Super Ninja! (After Eating Flower)
He throws Tiny Ninja Stars instead of fire.
My hack is a lot better than most because I actually took the time to change every single tile that mario is composed of, everything I changed, I changed completely. So check it out.