How about having the VR Troopers defeat Grimlord in the first episode of the third season, not knowing that a new villain decided to pick up where Grimlord left off. By the end of that episode, the new villain of the season defeated the VR Troopers in battle causing Professor Heart to create the Beetle Fighter armors in the second episode of the third season, giving them new powers to battle the villain group of the third season.