The Pandilla Guerrera is a group of an rudos associated with Guerreros del Infierno. They started off as GdI's form of Guapos U. Sangre Azteca and Koreano were kicked out of the 2004 Guapos U class after they prevented the rest of the class save Fabian el Gitano and Monito from an attack by Guapos rivals Ultimo Guerrero and [El Terrible]. Guerrero then started Pandilla Guerrera in the same vein of Guapos U. As opposed to GdI, this is a group of (acknowledged) undercarders, with the idea of banding together and working with the GdI to move up the card. When putting together this group, Ultimo Guerrero explained all members would have to keep up with the hard training of the GdI.
Different member lists have been given at different times. Wrestlers who include in the group at some point include:
Koreano was no longer acknowledged as a member when he switched to the Apocalipsis gimmick. Hooligan and Ramstein's names are not always listed as part of the group, and Arkangel isn't always associated with them. Averno & Mephisto are not part of the group or GdI; they've maintained a separate identity despite teaming with both groups often.
The membership of the group isn't really clear. After the first set of vignettes about the team, they progressed into guys with matching gear, but not much more than that (and not always even that.) In June of '07, Nitro was mentioned as being booted for the group for supporting Perro Aguayo Jr.'s reality show. It was an off handed comment by Ultimo Guerrero and Atlantis and there's been no reaction from Nitro, which speaks to how important the group right now.
The biggest success for the group so far was Sangre Azteca, Dr. X and Nitro winning the Mexican National Trios Championship, and Azteca also winning the Mexican National Welterweight Title. The Guerreros del Infierno have considered adding Azteca as a member based on his success and tryouts with the major team.
After Sangre Azteca joined Guerreros and Remstein drifted away, Pandilla Guerrera seemingly disappeared. Recently most of the core members reformed as Rebeldes del Desierto in a similar mid-card role.