Whew, this line took a bit of work.
Some parts are attached to their outfits, while other parts I wanted attached to their bodies themself, but you can toggle them around and see for yourself - primarily, Gigalith's orange armor parts and both her and Boldore's sphere shoulder pads attach to their main outfit and are also turned off for some, like their swimsuits.
Boldore's floating rock bits and Gigalith's mask both turn off with Sub, oh and so does Roggenrola's eye visor, though I think that should mainly stay on. She's like a cute little Cyclops in that way.
The main thing I left out was Gigalith's rocky knee joints, and that's because knee joints absolutely SUCK in Koikatsu. Like, you can attach it to the knee, but as soon as she bends it, it goes floating off into the distance. It's been years and I still don't know how to fix / get around that.
Anyways, the "original" Mega Gigalith will be out much quicker since it actually isn't that much more advance than regular Gigalith, just some alterations. I want to have some fun with the body proportions though. You'll see what I mean.
Also, I maybe a surprise soon after :)
Enjoy!