Antipode Bomb III (also known as Antipode 3 in the SNES/PS version) is a Tech used by Marle and Lucca in Chrono Trigger. To perform, Marle must know Ice II and Lucca must know Flare. Any time after learning Magic from Spekkio at the End of Time, Marle and Lucca can increase their Tech Points and eventually learn this tech. This is the stronger version of Antipode Bomb and Antipode Bomb II.
The screen turns a deep, crimson-red. Several explosives occur, as the result of Lucca's Flare tech. While the orange orbs are exploding, the enemies struck by the tech flash blue, indicating that Marle has frozen them.
The word antipode, in English, means opposites. Lucca's Element Fire and Marle's Element Ice are opposites, so the name fits. Additionally, Lucca performs several Techs that involve explosive bombs, such as Megaton Bomb and Napalm, so the inclusion of that word in the name may allude to this motif in her Tech library. The Roman Numeral for 3 simply implies that this tech is the third of its variety.