Word of warning: Cool Shades and tons of drills do not automatically make a good TTGL fanfic.
They do, however, get bonus points.
These are recommendations made by Tropers for Tengen Toppa Gurren Lagann fanfics, all of which have to be signed to stay on the page. Feel free to add a fanfic of your own to the list, but remember to use the template found here.
You can also add to the current recommendations if you want. Refrain from posting Conversation in the Main Page though; that goes in the discussion page.
Stories focused on the family and the friendly relationships of the cast. Plot-focused stories or light day-in-the-life stories. Pretty much anything that isn't focused on romance.DOUBLE K by CaptainOsaka (AU)
Synopsis: "The events of Gurren Lagann's prologue have long been open to speculation from fans. Herein lies the story of the great Captain Garlock, formerly Simon the Digger, who would take on the heavens themselves."
Confirmed a Dead Fic by the author, though he has expressed interest in one day picking the project back up again.
Synopsis: "A boy found in a mountain... A girl who is fighting an empire... A Brigade seeking to aim for the top... A dark shadow behind the decaying king... Two men: One - to pierce the heavens, the Other - to destroy it."
Synopsis: "Hundreds of years in the future, Viral has taken on the role of eternal storyteller, chronicling the history of the Spiral Race. But who knew it'd be such an annoying job? Pure crack, contains mild swearing."
Synopsis: An Alternate Universe taking place ten years after the original Time Skip that goes with the prospect of 'What if Simon and Nia hadn't met before her transformation?'. Simon has become Captain GARlock, the Earth was destroyed, and the Dai-Gurren Brigade is traveling the galaxy fighting the Anti-Spirals. Everything looks like shit, until he meets Nia for the first time.
Synopsis: "This is the story of a man who had made an uneasy peace with his Destiny. Sacrificing everything for the sake of his people, he had resigned himself to wander the Surface for the rest of his days cherishing the memories of his loved ones. Destiny would visit upon the man one final time, forever changing him in ways he would never have conceived."
The fic underwent a rewrite, under the name of Turn the Phase, in which adds some things like Simon having an apprentice and Simon and Nia's unborn child spirit as an antagonist.
Synopsis: After Kamina dies, he finds himself in the slums of Area Eleven. Takes place at the very start of the first season of Code Geass. I was skeptical at first, but this is easily one of if not THE best fanfic I've ever read. Characterization is perfect and Kamina's choatic (insane) personality really spices up the normally dark and depressing world of Code Geass without ever leaving character or completely ruining the actual characters or events. If anything, he makes a good show BETTER! Read it if you love either series.
Synopsis: "Just as the battle with the 14th Angel takes a turn for the worst, a mysterious red robot covered with drills crashes in from the heavens; changing the course of the fight and the EVA universe forever. Evangelion/Gurren Lagann crossover."
Synopsis:"A new world is drawn into the Eye of Terror, but when the Chaos force sent to raid it is destroyed, Chaos finds itself up against an enemy it has never seen before. The universe of 40K will never be the same!"
Synopsis:"Follows Kamina after his death. Set in the Bleach universe centuries after the canon. Kamina takes on death much as in life, fighting all that stands in his way. Dark forces are about though that threaten both the Soul Society and his friends on Earth."