So thanks to that link earlier, I now know that SMRPG not only had a crap ton of anime pop culture references, but had more sex jokes than I previously knew.
I love Japan.
The reason he uses it in a forest is because you get it after talking to Master Yen Sid at the Mysterious Tower, and then next playable worlds are either Kingdom of Corona or Toy Box. Kingdom of Corona (for worse than better) is mostly forest area, Formchange Extender is an ability basically gives you more time to trigger a Formchange than you would normally have (Formchanges have a limited amout of time to be selected, so Formchange Extender would increase that time from 2 mins to 4 minutes for a random, innaccurate to the game example), and Formchanges are essentially Keyblade transformations unique to each Keyblade (other than the ripoff Keyblades in the game, LOOKING AT YOU HUNNY SPURT!) that you can trigger by beating up enemies enough to fill this Arrow Gauge right above your Command List then pressing Triangle/Y. Formchanges change up how your combos work (Keyblade is now two guns or a hammer or a drill, thus you fight with it differently), sometimes changes how your magic functions and how your dodgeroll/airdash works as well as sometimes your Shotlock, usually does more damage overall and either has a Finisher you can trigger for major damage by yet again pressing Triangle/Y or a second form to achieve via more attacking and then that second form has a Finisher.
Shooting Star's first Formchange is Double Arrowsguns, which is very similar to Wisdom Form except you shoot two guns. This also augments your dodgeroll and airdash to be a simple dash with some invincibility that also fires the guns, and you have a sight mode where you can just open fire at a target with a reticle by holding R2. I believe you also fire magic more like a normal projectile. Your Shotlock changes so when you get max lock-ons you drop from the sky spinning and barrage the enemy with multiple shots. Shooting Star's second Formchange is Magic Launcher, a magic-firing rocket launcher. Your base combo is now a couple of melee attacks with the launcher then firing the launcher at them unless they are far away in which you just fire a couple shots and you keep the ability to once again hold down R2 to fire with a reticle, and the Finisher is just an amped-up shot from the Rocket Launcher that does more damage and has a much bigger range for a true AoE blast.
When completely upgraded, Shooting Star has STR 8, MAG 10 and both Formchange Extender and Magic Treasure Magnet (which works like the regular ability Treasure Magnet, but instead of having to stack multiple of the ability to increase from how far away you can pick up item drops, Magic Treasure Magnet lets you pick them up from any distance with just the one ability equipped).
As a fellow Geno enthusiast who thinks Geno could show up in the next KH game, there is little really tying this Keyblade to Geno, rather tying it to Mickey and how badass he is in KH Lore. It's interesting how it's rather balance between STR and MAG for a magical Keyblade though, and Geno has both good physical and magic damage.
EDIT: I got mostly sniped by
EarlTamm
but it's all good.