"Super Defense Robot", known as "Super Defense Robo" (SD (スーパーヂフェンス) ロボ Sūpā Difensu Robo) in the OCG, is an archetype of EARTH Machine-Type monsters used by Orbital 7 in the Yu-Gi-Oh! ZEXAL anime. The goal of this archetype is to quickly Xyz Summon Rank 8 Xyz Monsters, particularly their ace "Googly-Eyes Drum Dragon".

In the anime, they have a support card "Robocircus" that can aid in swarming, though in the OCG/TCG, the monsters have a similar swarming effect instead. In addition, the cards can work together with the card version of "Orbital 7".

All of the members are based on animals that commonly appeared in circus (even "Robocircus" itself is a circus), though their card names omit the last letter of the animals' names.

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