Super Mario Bros. Z

Super Mario Bros. Z, often shorted to SMBZ, is a series of Newgrounds videos, created by Alvin-Earthworm. It stars Nintendo legends Mario and Luigi, along with Sega stars Sonic and Shadow, who collect the seven Chaos Emeralds in a race against time, and they aren't the only ones after the Chaos Emeralds... The series itself is a spoof of DragonBall Z (Going so far as the "over 9000" gag) with Mario/Sonic characters.

Mario & Luigi
Mario and Luigi are two of the main characters of the series. Mario is the savior of the Mushroom Kingdom, and Luigi is his cowardly younger brother. The two reside as plumbers of the Mushroom Kingdom.

In SMBZ, Mario and Luigi are two great heroes.

Wario & Waluigi
Wario and Waluigi seem to serve as comic releif characters in Super Mario Bros. Z.

The Seven Chaos Emeralds and their Owners
***SPOILER WARNING***
 * Light Blue: Goomba, Mecha Sonic, The Gang
 * Red: Yoshi, Mecha Sonic, The Gang
 * Yellow: Koopa Bros., Mecha Sonic, The Gang
 * Purple: Axem Rangers X, Mecha Sonic, The Gang
 * Dark Blue: Unknown
 * Silver: Unknown
 * Green: Unknown