Sixth Rangers are rangers who are generally introduced outside of the core team. In most occasions they are the 6th to be introduced. However, the term 'sixth ranger' also applies to anyone outside the core team that starts regularly joining in battles. Sixth Rangers typically take on colors that are not used by the core team, though there are a few exceptions. There have been 18 official sixth rangers, with the Aquitar, Turbo, Lost Galaxy, and Jungle Fury Ranger teams lacking official sixth rangers, and RPM and Megaforce/Super Megaforce having two sixth rangers.