From left to right: "Spider Base", "Beetletop" and "Beetleturbo".
"Beetron" (ビートロン Bītoron) is a series of monsters that appeared in the Yu-Gi-Oh! GX anime. They were used by Chazz Princeton during his second Duel against Bastion Misawa and his Duel against Blair Flannigan. Similiar to the "VWXYZ" cards, two of them are Union Monsters and the three monsters can also be fused without "Polymerization".