Granzeboma

Granzeboma (グランゼボーマ, Guranzebōma?) is a mecha piloted by the Anti-Spiral in the final battle against Team Dai-Gurren. It was created as a mirror to the newly formed Tengen Toppa Gurren Lagann; as per their goal of inflicting absolute despair, the Anti-Spiral intended to use it to fight their Spiral foes on even grounds, thereby making their defeat even more crushing.

Its basic appearance is similar to the Tengen Toppa Gurren Lagann, but it lacks faces on its limbs and has a dark-colored, skeletal design. Its most notable feature is an extra pair of arms located on its shoulders, which it uses in battle to try and overwhelm Team Dai-Gurren.

After manifesting the Granzeboma, the Anti-Spiral engaged Tengen Toppa Gurren Lagann in a fierce battle. It initially held the advantage, but its attempt to seize the Earth through a super-dimensional portal in the pocket universe led to the heroes regaining their spirit and returning the beatdown inflicted upon them. Infuriated by the Spirals' persistence, the Granzeboma performed its ultimate attack; Infinity Big Bang Storm.

The attack was intended to annihilate Team Dai-Gurren, but it backfired when Lordgenome used the Lazengann  to take the blast, converting it and himself into Spiral Energy for the Tengen Toppa Gurren Lagann. With the massive boost, Tengen Toppa Gurren Lagann was able to match the Granzeboma blow for blow, with its pilots' determination fuelling it to match the Anti-Spiral's full power.

Ultimately, the Granzeboma was destroyed when Simon and Nia managed to pierce its pilot's body with the Lagann's drill via the Lagann Impact.

The second Gurren Lagann movie introduces the Super Granzeboma, an upgraded form of Granzeboma made to counter the Super Tengen Toppa Gurren Lagann. It appeared as a more humanoid version of the Granzeboma, lacking the shoulder arms and visible mouth on its stomach, and bore its base component between its massive horns in a similar fashion to how the Anti-Spiral homeworld was positioned on the Granzeboma's forehead. Despite being as large as its foe and even possessing an Anti-Spiral version of the Giga Drill Break, the Super Granzeboma was still destroyed when Simon landed on the Anti-Spiral homeworld and slew the Anti-Spiral in personal combat.

Attacks
Galaxy Shuriken: Using its larger shoulder arms, the Granzeboma can toss galaxies with enough force and speed to have them act as bladed projectiles. In Lagann-Hen, these galactic-scale shurikens can even damage a Tengen Toppa Gunmen. Infinity Big Bang Storm: Granzeboma grabs two galaxies with its large shoulder arms and msqueezes them together into a ball which contains the power of the Big Bang. The Granzeboma then throws the condensed ball of energy of the Big Bang at the opposing mecha, creating a massive explosion with galaxies literally flying from the point of impact.

Anti-Spiral Drills: Although the Granzeboma is an Anti-Spiral creation, it can still create drills - however, they have largely straight lines going from base to tip, making them more like spinning lances. The Granzeboma displayed two forms of drills: large Giga Drill-like weapons on its hands and narrow, tentacle-like drills released from its mouth and the Anti-Spiral homeworld on its head.

Trivia

 * The Romanisation of Granzeboma had been unknown for a long time, and a Romanisation was created that was Grand Zamboa. Eventually, the website for the Movies revealed that the proper way to write it in English is Granzeboma.
 * In contrast to Tengen Toppa Gurren Lagann, whose smaller components are within the head of the larger components, the Granzeboma's smaller components are prominently displayed on top of their larger sections; the Anti Spiral stands atop the Anti Spiral Homeworld, which in turn rests on the Granzeboma's forehead like a crown. In Lagann-Hen, the Granzeboma in turn forms the top of the Super Granzeboma's head.
 * Granzebomma looks a lot like the true form of Number 96: Black Mist from the Yu-Gi-Oh series. Additionally, Anti-Spiral resembles the fake form of Number 96: Black Mist.