one of the trophies for smash 4(the 4 ghosts i believe) says:
"Despite Luigi’s crippling fear of…well, everything, Professor E. Gadd ropes him into taking care of some unruly ghosts. Here we have four types: the small green ones are Greenies, the angry-looking red ones are Slammers, the thin blue ones are Hiders, and the big yellow ones are Gobbers. What appropriate names!"
"Despite Luigi’s crippling fear of…well, everything"