>>5952296>Afterimage Fist>Jajanken (Hybrid of Canon Rock-Paper-Scissor plus Ki-Alteration for a Gon-like style signature technique)>Rapid Movement>Aviation (Tail)>Shapeshifting (From Cho and Puar)>Ki clones and Feints of Internal Energy Add these to the list as well.
Note: As you can tell I'm not gonna go with the flat-out eighteenth-birthday prophecy of Oozaru's return for why Koku can turn into an Oozaru like a typical saiyan. Unlike pic related for those who carry Oden's essence aka humanity. The prophecy itself of Oden still exists, but the solar eclipse transformations are the byproduct of the curse, not the direct prerequisite for Oden to return.
Also, I'm going with U6 Saiyans are Neo-Saiyans as I do like what the manga tried to set up rather than having their tails mysteriously disappear like in the anime. But like with Cumber, they can extract their tails either as a form of energy construct or ethereally corporal appendages that can be retracted back inside. You, being a freak, have a naturally grown tail as you diverge from the Neo-Saiyans. Everything else such as harnessing the Oozaru powers in base, is something you share with the Neo-Saiyans.