Tenkuujin
Tenkuujin is otherwise known as Samurai Star Megazord. He was one of the last toys to be brought to the US for Bandai Americas Power Rangers Ninja Storm line. Unlike previous releases, Tenkuujin is unchanged from its Japanese counterpart. As a bonus, the US version includes the Tri-Condor, required to form TenraiSenpuujin (the combination of Gouraijin, Senpuujin and tenkuujin). Tri-Condor does not include the individual Karakuri Ball Shells.
Tenkuujin is made entirely of plastic. Its main gimmick is the propeller. Wind it up about 8 times (until you hear a click) and then press the center button and watch it spin. In helicopter mode, Tenkuujin features retractable landing gear and spinning tail rotors.
Transformation from helicopter to robot is simple, just separate the legs, split the cockpit in half and fold down the arms. Articulation is limited, but the spinning star gimmick still works in robot mode.
You can also use Tenkuujin as a weapon for Gouraijin or Senpuujin, as well as combining the three robots together.