Here's a little history lesson for you - back in the day (1987) there lived a pretty shameless Super Mario Bros rip off called "Great Giana Sisters", which was designed for the C64 home computer.
It was in fact immensely popular, probably in part simply because it's inspiration was sweeping the globe, and Great Giana Sisters was actually quite a good take on it, with more levels and arguably better graphics. It wasn't long, though, before it came to the attention of Nintendo and was pulled from stores and carted away following legal challenges from the Big N.
Fast forward to 2009 and the upcoming release of "Giana Sisters DS" in April. This new title retains the classic platforming look, without borrowing nearly as much from Mario this time around. With a wide range of creatures to battle in over 80 dream world levels while collecting diamonds, this new take is a lot more than just a knock off. It looks like a promising game so far and even revisits some of the original music tracks that have solidified it as a cult favorite.
Needless to say we're looking forward to killing a lot of time with this one. Developer Spellbound Entertainment has kindly put up a website at www.giana-sisters.com, so feel free to check that one out.