#2 Used on WWE TV: Rey Mysterio and Eddie Guerrero
Back in the 90s, Eddie Guerrero and Rey Mysterio were both two of the most popular stars in the Cruiserweight division. The future WWE World Champions had a string of classic bouts during their WCW stint.
Incredibly close in real life, both Rey and Eddie managed to wow WWE fans with their high-flying abilities and fast-paced techniques in the ring. Eddie made his way to WWE in 2002, as a part of The Radicalz. A year after WCW was bought off, Rey Mysterio made his WWE debut on SmackDown.
Both captured world titles in the coming years. In 2005, Eddie and Mysterio won the SmackDown Tag Team titles by defeating The Basham Brothers at No Way Out 2005 and went on to have a one-on-one match at WrestleMania 21, despite holding Tag Team gold together.
The duo soon split when Eddie turned on Rey and became a heel. Eddie and Rey had a months-long feud, which ended with Guerrero defeating Mysterio inside a steel cage on an episode of SmackDown.