>>342093Almost. In Go-Onger, Go-On Green and Go-On Black, although technically part of the main team, received their partners later than Red, Blue, and Yellow because Birca and Gunpherd (their Engine partners) got lost on the way. And while it is possible for Birca and Gunpherd to combine with Engine-O, they are not part of the standard formation and usually combine with Carrigator (who has no human partner but is allied with Green and Black) to form Gunbir-O.
Gold and Silver make up the secondary (auxiliary) team; the Go-On Wings, and are introduced later in the series.