GouGou Gattai machine number 5 is "GouGou Jet"! A big machine with a foot-long wingspan that can fire off its cockpit for separate adventures, and transport other GouGou machines underneath it.
Add to this the massive combined modes. By adding machines 1 ~ 4 to Daibouken, you get a giant 9 machine power up mode. On top of that, add GouGou Jet for a 10 machine mega power-up!
GouGou Jet sells in June for ¥3,675.