Super Mario Bros Party! Help?

My son wants a Super Mario party and i can't find anything. Went online and saw party packs but i dont like them. I have no idea what to do for decorations or a cake. Im renting a moonwalk so im not having the kids play games. Any creative ideas?|||Have Mario Bros games setup and ready on the tv so kids can take turn playing it. And go to ur local bakery, those places will most likely design an original cake for you|||You could decorate with gold star shaped mylar balloons. You could also use card stock to make mushroom shapes to hang up around the house.|||buy some mushrooms and fry them with french onion dip get some dollar tree red hats