The 8 Astral Coins are at last reunited with the Astral Sword, leading to the summoning of the giant robot beetle fighting creature, Roboborg! But whose side will he be on?

Nukus and Vilor get an upgrade, going Mega powered. To even things up, the Beetleborgs are given a power-boost by Roboborg, fusing their old powers with their Metallix ones, creating the Mega Spectra Beetleborgs! But will this added armor be enough to stop Mega-Nukus?

Les creates the Astral Ax, and with it, Roboborg's evil counterpart, known as Boron. Mega-Nukus pits Boron and Roboborg against one another.

Roboborg battles Boron... this time on the moon!

Count Fangula becomes a super hero by helping out the Beetleborgs defeat their rivals/enemies.

Dr. Baron Von Frankenbeans' latest creation, a mutant plant, is sought by Mega-Nukus' forces.

The Beetleborgs make one last play to gain control of Boron.