individual-color-variation VS hgss-map-randomizer

No, ICV doesn't change shiny rate. I don't know if your game is safe with all of this, but I can definitely tell you that there is already a patch that incorporates RP, FP and ICV. You can get it from here - https://github.com/TheGag96/individual-color-variation/releases - after that you can slap the shiny rate increase patch on it, start a new game, and well, pray that everything works. It should work, but NDS patching is finicky and with that many patches risk increases.

Yes this exists for Platinum here

the xdelta patch is available to download from here. are you having trouble applying this patch? if so, we can help if you're more specific about the issue.

What you'd be changing is a constant in the file tableprinter.d over in the Gen 4 version of the mod. If you're doing this for a Gen 4 game, change MAX to whatever number you want, then follow the build instructions (which involves installing a D compiler). You can shortcut things by just replacing the table in an already-patched ROM, if you do some fiddling.

Patch download

I watched that SmallAnt video and a couple others play HGSS with almost every warp randomized. The link is in that description https://github.com/adrienntindall/hgss-map-randomizer/releases/tag/Release but the .exe thats supposed to randomize the rom of your choice, is a microsoft application and I have a mac. Is there an easy way to get around this? Could I get someone with windows to download it and randomize a rom and then send the rom file to me pre-randomized? I have little to no knowledge about any of this stuff, it's my first rom, please send help:)

I have no idea if the elements about code use are true, but regardless smallant didn't make the mod or post it on github, that was done by someone else, he just played it.

Here is the link: https://github.com/adrienntindall/hgss-map-randomizer/releases