Kaizoku Gattai GokaiOh is the primary mecha of Kaizoku Sentai Gokaiger (2011), the 35th Super Sentai series. It belongs to the Gokaigers, a crew of space pirates, and is formed through the "Pirate Combination" (Kaizoku Gattai) of the five GokaiMachines — the personal vehicles of the team's five core members. In the Western adaptation Power Rangers Super Megaforce (2014) the same robot appears as the Legendary Megazord, assembled from the Legendary Zords led by the Red Galleon.

The red galleon flagship GokaiGaleon (GokaiRed) forms the torso, head and shoulder/back section, the blue GokaiJet (GokaiBlue) the right arm, the green GokaiRacer (GokaiGreen) the left arm, the yellow GokaiTrailer (GokaiYellow) the left leg, and the pink GokaiMarine (GokaiPink) the right leg. The design leans heavily on a pirate theme, with a tricorne-like head and a skull emblem. GokaiOh fights with two cutlass-style swords (Gokai Ken) and, as its finisher ("Gokai Star Burst"), fires cannonballs from the galleon's cannon. It can be expanded with auxiliary mecha such as GoZyuDrill into stronger configurations, including Kanzen (Perfect) GokaiOh.

The DX toy was released in 2011 by Bandai Japan as "DX Kaizoku Gattai GokaiOh." It includes all five GokaiMachines, which can be played with individually and reassembled into the complete robot; in keeping with Bandai's main DX mecha of the period, it uses die-cast parts (mainly in the feet) for stability, and two Gokai Ken swords are included. For the Western market, Bandai America released a largely identical version as the Legendary Megazord (Super Megaforce, 2013/2014), so GokaiOh is not Japan-exclusive and also exists as an official Power Rangers product.