After Bellri recognized his sister, Aida, they went to Towasanga to recapture the G-Self. However, they were attacked by the Capital Army and one of its members, Mask, with his newest mobile suit, CAMS-RX0 Gundam G-Phenex. As Bellri and G-Self come to stop G-Phenex's attack against G-Arcane, G-Phenex's unusual Newtype power is released.

Source: Gundam Wikia

AniDB | ANN | MAL

Parent story: Gundam G no Reconguista