Rollbot

Rollbot appeared in 1995 TV series called VR Troopers. Rollbot is a yellow robot that had the ability to turn into a ball and also had super strength, which he used to toss heavy boulders. He assisted General Ivar into trapping J.B. on an old mountain which was really a dormant volcano. Rollbot kept the Troopers busy with laser-like yellow projectiles and by rolling himself into ball form and crushing Kaitlin. J.B. eventually escaped the trap and formed the VR Double Team with Kaitlin, which created an explosion, but that was only from his ball form being forced back to normal. After the smoke cleared, he could be seen charging in his normal form at JB and Kaitlin, much to their surprise. Even though the VR Double Team had no effect on him whatsoever, the Laser Lance destroyed him just as easily as it did other bots, requiring only a bit more slashing (the impalement even made Rollbot surrender). JB used his Laser Lance to promptly finish off the unharmed, and very angry, charging Rollbot. Rollbot fits the category of General Ivar's Machine Men army.