Chemistry is the ultimate x-factor in professional wrestling.
It can't be faked, nor can it be taught in a first-class Performance Center or ingrained into two or more wrestlers through drills and other exercises. Groups and pairings either have it or they don't and even then, putting a bunch of talented people in the same place at the same time often isn't enough. See AJ Styles and Kevin Owens, Braun Strowman and Brock Lesnar, The Undertaker and Steve Austin, and Ric Flair and Baby Doll as examples: good pairings on-paper, but hampered by a lack of chemistry.
The je ne sais quoi often comes from the unlikeliest of combinations. Sometimes, a pairing that makes little sense on paper comes through and absolutely kills it on television, with seemingly disparate characters and personalities thriving because of the differences that supposedly made their relationship unworkable. This list is a celebration of some of the more notable cases of this.
Many of these combinations are a variation on the textbook straight man/comic double act, though much of the magic comes from the individual characters rather than the framework. Let's start with a recent example...
A caffeine-dependent life-form from the frozen wastes of north east Scotland. He once tried to start a revolution but didn't print enough pamphlets, so hardly anyone turned up. Give him a follow @andyhmurray. You'll have a great time. Maybe.