Oathkeeper & Oblivion

When Roxas uses his full power, he wields both Oathkeeper and Oblivion. His strength greatly increases when used. It is first used in Kingdom Hearts 2 when Roxas battles Axel for the second time. It can also be used in the last mission of Kingdom Hearts 358/2 Days. In mission mode of Kingdom Hearts 358/2 Days, if you equip the Zero Gear with 3 ability units on Roxas, then you can use both Oathkeeper and Oblivion.

Trivia

 * You can't Dual-Wield Oathkeeper and Oblivion in story mode. When you equip the Zero Gear with 3 ability units, then the keyblade will change back to Kingdom Key+.
 * When Dual-Wielding Oathkeeper and Oblivion in mission mode, he is very weak compared to in the last mission where he can destroy Neo Shadows in 1 hit.