[Matrixbeast]

So, with the revelation that Beet and Stag Buster are 6ths/Additional Rangers (Whichever you want to call it), it leads me to ask: How do they pick which rangers are core team members, and which are additional.

JAKQ's Big One is a core member, despite being a late addition (And hitting all the key points of a 6th ranger)
AbareBlack is also a core member despite transforming later on, however, he is generally exempt because he's present from episode 1 and I think he regains the ability to morph by episode 6 or 7 (And including him would have to bring up the Kakuranger and Jetman's delayed team forming, too, so I'll be fair).

But then there's the 3 man teams.
Liveman's Black Bison and Green Sai, Gekiranger's GekiViolet and Chopper, and the Gouraigers in Hurricanger. The first two set those rangers up as main rangers despite joining later on in the series (Though the Gouraigers do seem to have more of a divide in Hurricanger, and it's just Gokaiger that treats them as part of the core team).

So why are Beet and Stag Buster considered 6th/Additional members, when they should fall under the same category as Liveman and Gekiranger? I mean, at least the Go-On Wings and the Gouraigers had the decency to have their own team name to make it clear there was some kind of divide
(But for real, I'm rather confused)