I was watching random videos on youtube, and I came across something from Super Paper Mario: A starman that turns you into a giant, 8-bit version of yourself. I thought, "man, wouldn't it be cool to have this in SMBX?" And so I did my best to carry it over. It's far from perfect, but it is functional.

http://www.mediafire.com/download/suryp ... _8-Bit.zip
An example level is included. You should be able to figure it out from that.