#2 "Superheavyweights" Bob and Crash Holly
The Gimmick in a Nutshell: Two undersized wrestlers claim to be much larger than they actually are.
Bob "Sparkplug" Holly was a wrestler brought in during WWE's New Generation era, a time that saw the rise of stars like Bret "the Hitman" Hart, 'Heartbreak Kid' Shawn Michaels, and Razor "Scott Hall" Ramon. Unfortunately, Holly's race car driver gimmick didn't go over nearly as well as those three other gentlemen did.
Eventually, Bob Holly became "Hardcore" Holly and started to make some pretty outlandish claims. During a feud with the Big Show, Holly would claim that he, too, was a super heavyweight, weighing in at well over four hundred pounds. Despite the ludicrous nature of the gimmick, it was a hit, and they even added Holly's 'cousin' Crash into the mix.
Why the Gimmick managed to work: Hardcore Holly is apparently an unpleasant guy backstage, at least according to some of his peers. However, he had good comedic timing and came across as an underdog. Crash's involvement certainly helped, as did the ring announcer stating that the duo weighed in at an 'alleged' four hundred pounds each.