How do I get the Megazord?

Just got all the shiny forms and not a singular copy of it.

Is it locked behind the Ken questline? Am I only able to get it after getting all the shinies? Or am I just unlucky?

Just got all the shiny forms and not a singular copy of it.

Is it locked behind the Ken questline? Am I only able to get it after getting all the shinies? Or am I just unlucky?