>>6125087Not possible, the Red Dragon doesn't have any zordbuilder ports. It combines the same way as the original. Only Blue and Yellow's Thunderzords are really zordbuilder friendly (via a flip up port when combining with anything other than Red). Black has zordbuilder ports for connecting to form Mega Tigerzord, but you can't really use them to make arms.
As someone who loves the zordbuilder gimmick I feel as if Bandai doesn't put as much thought into it as they should. It disappoints me that the Lion Thunderzord can't be used as normal arms, surely there was a way. Also woulda been neat if the Firebird had a port on the bottom, which would allow it to form wings on Megazords with a back peg, like Ninja Steel Megazord.