I put a Luigi head next to Mario! I used the same template but just changed the colour of the hat. Dont say that luigi looks fat!
The Mario took a couple of hours. (from 2:30 till 5) to make in the evl creative server (mine.evlgaming.com). Made from coloured wool and sandstone, starting from the sandstone up to the hat.
The Luigi was copied with WorldEdit and the hat colour was changed to green.
Hope you like ^.^