3DS Mario kart 7 trainer ntr cfw plugin reversed

I reversed the mario kart 7 trainer plugin (https://gbatemp.net/threads/mario-kart-7-trainer-plugin-200cc-500cc-9000cc.394098/).
Here, I detail the interesting code, so someone else can make it work with AR3DS or something else.
When I refer to things being the "default", I mean the default from cell9's plugin example found here: https://gbatemp.net/threads/release-zelda-albw-usa-cheat-plugin-for-ntr-cfw-1-x-2-x-with-source.392209/

tags: 3ds n3ds cfw rom piracy pirate cia hack exploit gateway gbatemp cheat plugin ntr 1337 hacks just add this to that pastebin thread damnit.

loc_118: Start of cheat plugin code (This is the default gamePluginEntry. Nothing of interest here.)

loc_154: Starting values
r5 = 0x1537669C (?)
r4 = 0x41100000 (Normal cc)

loc_15C: Checks buttons to change r4
b sub_B0  (default getKey() function)
r4 = 0x41A00000 (Dpad Right = 500 cc)
     0x413C0000 (Dpad Left = 200 cc)
     0x42C80000 (Dpad Down = 9000 cc)
     0x41100000 (Select = Normal cc)

In any case, If any of the buttons is pressed, sub_D0 is called, which goes like:
while(sub_B0() != 0) {
    svcSleepThread(0x5F5E100)
}
This is the default waitKeyUp function.

After r4 is set:
r3 = 0x153765F0 (?)
while(r5 != r3) {
	*r3 = r4
	*(r3 + 0x680) = r4
	r3 += 4
}
b loc_15C (This is an infinite loop)