"My mother tries to guess the names of Smash Bros. characters."
"The Cube"—a hollowed-out block of brioche stuffed with French fries or mac 'n cheese—started off as an inside joke, a riff off the mystery boxes in Super Mario Bros. that reward players with medals or mushrooms, super leaves or fire flowers.
"We were, like, let's just have fun with this—let's stuff it with fries. Then we started getting crazy." [source]
Hammer Bros. jump pretty high for dudes carrying a bunch of hammers.