[TokuChris]

Here you go! Reference.

Zyuranger
Sixth = Dragon Ranger

Dairanger
Sixth = Kiba Ranger

Kakuranger
Sixth = none

OhRanger
Sixth = King Ranger

Carranger
Sixth = none
Extra Hero = Signalman

Megaranger
Sixth = Mega Silver

Gingaman
Sixth = None
Extra Hero = Black Knight

Go Go V
Sixth = None
Extra Hero = None

Timeranger
Sixth = Time Fire

GaoRanger
Sixth = Gao Silver

Hurricanger
Sixth = Shurikenger

Abaranger
Sixth = Abarekiller

Dekaranger
Sixth = DekaBreak
Extra Heroes = DekaMaster, DekaSwan

Magiranger
Sixth = MagiShine
Extra Heroes = MagiMother, Wolzard Fire

Boukenger
Sixth = BoukenSilver
Extra Hero = Zubaan

Gekiranger
Sixth = None
Extra Hero = Rio, Mele

Go-Onger
Sixth = Go-On Silver, Go-On Gold

Shinkenger
Sixth = Shinken Gold
Extra Hero = Female Shinken Red

Goseiger
Sixth = GoseiKnight

Gokaiger
Sixth = Gokai Silver

GoBusters
Sixth = None

Kyoryuger
Sixth = Kyoryu Gold
Extra Heroes = Kyoryu Cyan, Kyoryu Gray, Kyoryu Violet, Kyoryu Silver, Kyoryu Navy

ToQGer
Sixth = ToQ 6

Ninninger
Sixth = ?????
Extra Heroes = yes please

Ta-da!