Battle Robo

 

Battle Fever J was the first Sentai that featured a giant robot.  It's a cool looking mecha, and the first six episodes it's not even featured in the show.  It's mentioned as a secret weapon, and when it finally debuts it's pretty cool.  It's need to battle Egos giant versions of their monster of the week.

This is ruined since it appears in nearly every episode after that.  This is a standard of all Super Sentai shows, and it seems there are thousands of robots in all the current shows.  Seems to me if they would use them every 4-5 episodes it would seem far more special than being seen in every episode.

But what do I know?  I know it's to sell the toys, and that keeps the shows on the air.