The Superior Italian Plumber
While his brother's rival is Wario, this is the name of Luigi's lanky rival.
Waluigi
The Russian psychologist who discovered classical conditioning by measuring dog's saliva responses to a stimulus.
Ivan Pavlov
C.I.A.
Central Intelligence Agency
In "Finding Nemo," Marlin was this species of fish that is immune to an anemone's poison.
Clownfish
"I'm just a poor boy, I need no sympathy,
Because I'm easy come, easy go,
Little high, little low"
Bohemian Rhapsody - Queen
Luigi's infamous "death stare" meme came from this title on the WiiU.
Mario Kart 8
This psychologist was known for work in psychoanalysis and he thinks you might have mommy issues.
Sigmund Freud
A.D.H.D.
Attention Deficit Hyperactivity Disorder
This is the largest and most dangerous species of dolphin.
Orca/Killer Whale
"Liar, lawyer; mirror show me, what's the difference?"
The Pot - Tool
In Luigi's Mansion, our Green hero needs to save his brother from this scary baddie.
King Boo
This controversial social psychology study on role-playing and authority from the 1970s had to be shut down after just six days.
The Stanford Prison Experiment
A.I.D.S.
Acquired Immune Deficiency Syndrome
Most of the Earth's coral reefs are located in this ocean.
The Pacific Ocean
"You better run, you better do what you can,
Don't wanna see no blood, don't be a macho man"
Beat It - Michael Jackson
Luigi's first playable video game appearance was in this 1983 classic.
Super Mario Bros.
From the Latin for "about a day," these body rhythms govern cycles of wakefulness and sleep.
Circadian
E.S.L.
English as a Second Language
This type of shark can survive in both saltwater and freshwater.
Bull Shark
"I was down at the New Amsterdam,
Staring at this yellow-haired girl"
Mr. Jones - Counting Crows
Before Luigi's Mansion, Luigi actually took the spotlight as the main character in this game, originally released on the PC and SNES.
Mario is Missing!
This man coined the first official psychopathy checklist to help identify individuals with antisocial personality disorders.
Robert Hare
R.A.D.A.R.
Radio Detection and Ranging
This "crab" is not a true crab at all and is actually more closely related to spiders and scorpions.
Horseshoe Crab
"Some folks are born made to wave the flag,
They're red, white and blue"
Fortunate Son - Creedence Clearwater Revival