R-Series are bosses that appear in the Derelict Factory in 2300 AD. They are related to Robo, except their mission is to exterminate the humans, one they claim Robo has forgotten. Deeming him defective, they assault him and throw him into a garbage chute, before turning their attention to the human intruders. Infuriated by what they have done to Robo, Marle or Lucca, along with Chrono, fights and defeats them.
With Robo out of commission, the player only has access to Chrono and the party member who came with him to the Factory. Use Cyclone or Fire Whirl to hit multiple foes at once.
|Chrono Trigger Bosses|
|Prehistory||Nizbel | Nizbel II | Azala | Black Tyranno|
|Antiquity||Golem | Mud Imp | Red Mudbeast | Blue Mudbeast | Giga Gaia | Dalton | Lavos | Golem Overlord | King Dalton|
|Middle Ages||Yakra | Ozzie | Zombor | Masa & Mune | Flea? | Flea | Slash (Unarmed, Sword) | Magus | Melphyx (Core, Upper Body, Lower Body) | Diva Flea | Super Slash | Ozzie the Great | Rust Tyranno|
|Present||Dragon Tank | Heckran | Yakra XIII|
|Future||Guardian (Pod) | Krawlie | R-Series | Lavos Spawn | Mother Brain | Son of the Sun|
|Black Omen||Mega Mutant (Upper Body, Lower Body) | Giga Mutant (Upper Body, Lower Body) | Tera Mutant (Upper Body, Lower Body) | Elder Lavos Spawn | Queen Zeal | Mammon Machine|
|Bosses in the DS||Goldhammer | Nu Guardian | Nu Master | Archaeofang (Elder) | Archaeofang (Younger) | Master-at-Arms | Bladesman | Once-King Dalton | Steel Shade | Alabaster Shade | Crimson Shade | Eggsterminator | Dream Devourer|