Giga Drill Break

The Giga Drill Break (often called Giga Brill Breaker) is a technique originally used by Kamina, and has since become the signature attack of Simon along with Lagann Impact. The technique itself uses an actual piece of equipment called a Giga Drill, formed every time the move is used.

Gurren-Lagann
Gurren-Lagann first performs a Giga Drill Break when Kamina using it as a finishing move with which to defeat Thymilph during the siege of Dai-Gunzan. It isn't until Simon uses it against Guame's custom Gunmen, the Gember, that it becomes his signature move, and is used against most of the series' stronger enemies.

The move, however, fails to defeat Lordgenome, as his Lazengann is able to bite down on the Giga Drill when it is about to pierce the torso of the mech, and break it with its teeth. This is one of the first cases in which a Giga Drill is able to break.

King Kittan


One of the only mechs besides Gurren-Lagann seen performing a Giga Drill Break. Kittan Bachika has his mech perform this move as a last resort in destroying the Death Spiral Machine in order to save Team Dai-Gurren from the Galactic Spiral Abyss. What is notable about this version is that the Giga Drill used is much larger in proportion to the body of the mech than is normal, comparable to the proportions of the Giga Drill used by Super Tengen Toppa Gurren Lagann in the second movie adaption of the series.

Super Granzeboma
Super Granzeboma uses its own move, the aptly-named Anti-Spiral Giga Drill Break, in order to counter Team Dai-Gurren's Super Tengen Toppa Giga Drill Break. When the two collide, they cause distortions in the pocket dimension, pulling in all of the galaxies nearby and causing the space to become dark. Super Granzeboma eventually breaks through, but its Giga Drill is broken when faced by all of the other forms of Gurren Lagann in succession, eventually giving way to the original mech's drill.

Trivia

 * All forms of Gurren Lagann have used at least one Giga Drill Break except its titular form, the Tengen Toppa Gurren Lagann. The mech did, however, still use Giga Drills.
 * In the orginal Japanese anime, the voice actors said Giga Drill Break, but because of the style in which they spoke, were misinterpreted as Giga Drill Breaker. This was followed by subtitles that labeled it as such.