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Overdrive (オーバードライヴ , Ōbādoraivu) is a function of the Appli Drive DUO capable of draining the Appli Driver's life energy in exchange for maximizing an Appmon's power.
In "Thank You Future! Welcome to the City of AI!", Ozora Yujin used Overdrive to send his energy to Offmon, who had been drained alongside Gatchmon, Dokamon and Musimon, by Batterimon. Overdrive allowed Offmon to recover and made him strong enough to defeat Batterimon with one Switch Lazy. Afterwards, seeing the tired Yujin, Gatchmon theorized that the Appli Drive DUO could channel its Appli Driver's power into their Buddy Appmon to power them up.
Shinkai Haru used Overdrive in "Ultimate Fierce Fighting! Globemon VS Charismon!" to power up Globemon so he could fight against Charismon, himself strengthened by the L-Code. Unlike Yujin, who was left merely winded, Haru soon fainted after using Overdrive, but the sacrifice wasn't in vain, as Globemon was able to overpower and defeat Charismon thanks to it.