Hyper Tengen Toppa Gurren Lagann (ハイパー天元突破グレンラガン)

This form is the result of the "Super Tengen Toppa Gunmen" combining. In the final battle against the Dark Ginome, Simon's Spiral Power reached a level where it completely bypassed all forms of reality, and Simon used this to combine the Super Tengen Toppa Gunmen into one mecha: the Hyper Tengen Toppa Gurren Lagann. It engaged in a death match wiith the Dark Ginome, which transformed into the Hyper Dark Ginome to counter it. However, the Hyper Tengen Toppa Gurren Lagann is eventually overpowered, and Simon freaks out on why the apparent strongest form of Gurren Lagann is defeated. However, the spirit of Kamina appears and tells Simon to never give up, and that he should believe in the Kamina that believes in him. Motivated by Kamina's spirit, Simon unleashes an aura of Spiral Power, and all the other Super Galaxy Dai-Gurren Brigade begin to channel it, thus leading to the creation of...

Ultimate Tengen Toppa Gurren Lagann! (究極天元突破グレンラガン!)

Now newly powered up, the Ultimate Tengen Toppa Gurren Lagann easily overpowers the Hyper Dark Ginome. Angered, the Hyper Dark Ginome transforms once more, this time into the Ultimate Dark Ginome. It first seems to be equal in power to Ultimate Tengen Toppa Gurren Lagann, but starts to gradually overpower it. Simon then breaks into despair, and hopes a miracle would appear. Suddenly, an enormous winged mechanical golden creature appears, and it says that no matter where trouble is, it'll destroy it. It then proceeds to merge with the Ultimate Tengen Toppa Gurren Lagann and it turns gold, with a heavily upgraded armor covering it. This forms the extension of UTTGL, Ultimate Tengen Toppa Gurren Lagann Power Ultimaximum, and it proceeds to completely overpower the Ultimate Dark Ginome. The Blackginomes then lose all hope of winning, and pleaded for the Super Galaxy Dai-Gurren Brigade to finish them off. The Ultimate Tengen Toppa Gurren Lagann Power Ultimaximum then used its signature move, the Ultimate Tengen Toppa Giga Drill Break Power Ultimaximum in order to finish off the Blackginomes.

Note: Hyper Tengen Toppa Gurren Lagann is 500 million times larger than the Super Tengen Toppa Gurren Lagann, and the Ultimate Tengen Toppa Gurren Lagann and its extension form is 950 trillion times larger than the Hyper Tengen Toppa Gurren Lagann.