Here's my cover of Waluigi Pinball from Mario Kart DS! This theme really stuck with me, even after I was done playing Mario Kart DS - in this arrangement I've tried to maintain the funky/wacky mood of the original theme, developing my ideas around this premise.
This is my arrangement for Masked Dedede's Theme, from Kirby Super Star Ultra. As you can hear, I've also included a nod to the original King Dedede's Theme. The composers of the original track are Jun Ishikawa and Hirokazu Ando.