18,921GamerZack87Sat 7th Sep 2013 Luigi is actually a member of a secret organisation known as the PLUMBERS, who have ties to extraterrestrials. The main colour of the PLUMBERS is green, which is the colour Luigi wears. And yet Luigi has never been on a single episode of Ben 10. "Pay me 20 Rupees and I'll talk." CHINK "Never forget the comfort of freshly-washed shorts."