Once, I was watching an episode of the Powerpuff Girls... not sure which one, but they were playing video games, and they each had Nintendo 64 controllers (an orange, green, and purple one, I believe) ... not sure what game it was imitating, I've forgotten.
I hope that works.
Let's see... once, I was at a theme park, and I saw a custodian. He was in faded overalls, a green shirt, with a green backwards cap, fairly tanned with the EXACT same mustache as Luigi, and blue eyes. While this is not a cameo, it was an utterly uncanny resemblance. = )
See how the mustache hides the slightly sad smile... and the sideburns, portraying his simple, blue-collar roots... and his legs, thick, wide, the legs of the masses!