Four Is Death/Playing With

Basic Trope: The number four is bad somehow.

Straight: The Five-Bad Band to Emperor Evulz are Doom Komodo, Dr. Von Testlastein, Violet Darkheart, and Lamia. The Five-Man Band of Magic Knight Edgar Homos, Knight in Shining Armour Bob Equus, Black Mage Dave Felis, White Mage Carol Avius, and Bare-Fisted Monk Emily Canus stop them from blowing up several places.
Exaggerated: Almost everyone dies when four people are together - the heroes refuse to operate with one member missing.
Downplayed: ???
Justified: The villains are The Psycho Rangers to the Five-Man Band, so Emperor Evulz chose four executives.
Inverted: There are four gods of life that Carol, Dave, Bob and Alice speak to.
Subverted: You hear about a group called the "Shitenno" who everyone fears, and their "Leader". It turns out that Edgar is the Leader, and Carol, Dave, Bob and Alice are the Shitenno.
Double Subverted: ???
Parodied: A lot of characters die - the digital root of their ages is 4.
Parodied: ???
Zig Zagged: ???
Averted: ???
Enforced: ???
Lampshaded: ???
Invoked: ???
Exploited: ???
Defied: ???
Discussed: ???
Conversed: ???