[Sunred]

Quote:

Originally Posted by Kamen Rider Lucha

Dragon Caesar combined with the other Zyuranger mecha, even though Dragonranger started out as a bad guy.
Abare Killer's mecha combined with the other Abaranger mecha, even though he was a bad guy.
Barikion combined with MagiPhoenix to create FireKaiser, even though Wolzard was a bad guy.
Build Dai-Oh combined with Drill Ressha, even though Drill Ressha was a Shadow Line mecha.

The point is, a sixth hero's alignment very rarely has any bearing on whether his mecha can combine with the main team's.

To add to your statement which I agree on there is also this looking back now.