<P> During Big O's fight with Big Fau, the latter utilizes some kind of energy shield, which may be its own Plasma Gimmick . </P> <P> The Final Stage (ファイナル ステージ, Fainaru Sutēji) is used during the final episode . Big O's' steam boiler' chestplate opens up and a massive, telescopic cannon emerges from the Megadeus' chest . The Mobydick Anchors are deployed into the ground to withstand the recoil, the Plasma Gimmick is activated to protect the momentarily incapacitated Megadeus and the Sudden Impact pistons are primed to give a little extra firepower to the projectile itself . The cannon has enough destructive force to destroy an entire dome in one shot and is so powerful that it erodes itself to rust & breaks off after use, leaving a cavity in Big O's chest . </P> <Table> <Tr> <Td> </Td> <Td> This section does not cite any sources . Please help improve this section by adding citations to reliable sources . Unsourced material may be challenged and removed . (March 2015) (Learn how and when to remove this template message) </Td> </Tr> </Table> <Tr> <Td> </Td> <Td> This section does not cite any sources . Please help improve this section by adding citations to reliable sources . Unsourced material may be challenged and removed . (March 2015) (Learn how and when to remove this template message) </Td> </Tr>

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