Well, I'm actually writing my own SD Gundam story. It's a retelling of Gundlander, so instead of the pre-history setting that eventually became confusing, I had it set at a post-apocalypse world that after fifty years is slowly getting back on its feet. All of the MS usints are called Landers; mysterious life-forms that are a combination of robots, mutants, and depending on the model, parts of nature. There are humans in this world, but they are almost reduced back to the stone age due to the "Great Catastrophe" wiping out all data and are struggling against the Landers. Anyways, the main hero is a newly awakened Lander named Leo, who has a conscious system that allows him to learn and think like a human.
This story has a lot of things thrown into it based off on other things. The setting is like Fist of the North Star, Metal Max, and Fallout. The humans are similar to the settings. The malevolent Landers are like Terminator, Snatcher, and bits of Devilman. And finally, the Gundlanders (especially Leo) are mixed with Johnny 5, Wall-E, Chappie, Kikaider. Designs for the most part are obviously Gundams, but Leo is a mix of the RX-78-2, Barbatos, the fan-made Gun Hundred, and my personal favorite, the one that helped created the inspiration, a model that is being pre-order from Plum called Gao. I have key points already thought out, but writing down the things in the middle is often hard for me.
I've done some imagining now and then about writing my own SD Gundam work, mostly based on the Command Chronicles series, but I've mostly been drawing adaptions of the newer Knight Gundam series in my spare time.
I tried to make Doozy Bots coherent, one time. A lot of it was just getting it to make sense (ex: let's just have the kids pilot 8-foot mobile suits instead of getting their brains transferred to robots. They're all in high school, so they're not licensed to pilot the normal-sized ones yet). Then I thought it would be funny to make a Subverted Kids Show where things started out all cute, and then suddenly got creepy. It ended up becoming depressing somehow.
In truth, I've had many Gundam Fan stories, mostly with Gundam Wing characters crossing over to other shows. I even had characters from Chrono Trigger (one of the best SNES games out there in my opinion) put into Gundam Wing. I even had Crono (that's the main character in Chrono Trigger) pilot another Sunrise mech, a Gundam version of Escaflowne. And whenever there was something I didn't like about the shows, like a character died; then Crono would alter time to save them. This was before I found out about Super Robot Wars and how they would change their fates in those games. I even did this for non Gundam Shows like Ideon and Zeorymer. Some I have written myself, but mostly the key points in my stories.
The scenario I came up with was that it takes place in one of the various space colonies established after Super G-ARMS. There are two protagonists: Gunbolt, (Design basis: FA Gundam Thunderbolt Ver), who had been assigned recently to the local police force (which was established by the members of G-ARMS) and Captain Winning Gundam (Design basis: Winning Gundam, of course), a student under the force's leader Commander Scramble and the daughter of the colony's govoner.