Miniturbo boost is mushroom boost [Gaberboo]

[Gaberboo]

PAL
C25830E0 00000006
A95D0148 7FE90734
7C095000 811D0000
81080004 81280008
61290080 91280008
40810008 B3FD0148
70000004 60000000
045830E8 A81D0110
04583100 B3FD0110
04583108 60000004

NTSC-U
C257C87C 00000006
A95D0148 7FE90734
7C095000 811D0000
81080004 81280008
61290080 91280008
40810008 B3FD0148
70000004 60000000
0457C884 A81D0110
0457C89C B3FD0110
0457C8A4 60000004

NTSC-J
C2582A60 00000006
A95D0148 7FE90734
7C095000 811D0000
81080004 81280008
61290080 91280008
40810008 B3FD0148
70000004 60000000
04582A68 A81D0110
04582A80 B3FD0110
04582A88 60000004

NTSC-K
C2571138 00000006
A95D0148 7FE90734
7C095000 811D0000
81080004 81280008
61290080 91280008
40810008 B3FD0148
70000004 60000000
04571140 A81D0110
04571158 B3FD0110
04571160 60000004

Intended to be assembled as a raw

Code:

.set region, ''

.if (region == 'P')
    .set KartMoveReleaseMt, 0x80582f9c
.elseif (region == 'E')
    .set KartMoveReleaseMt, 0x8057c738
.elseif (region == 'J')
    .set KartMoveReleaseMt, 0x8058291c
.elseif (region == 'K')
    .set KartMoveReleaseMt, 0x80570ff4
.else
    .err
.endif
.long 0xC2000000+KartMoveReleaseMt-0x80000000+0x144
.long (realend-start) >> 3
start:
lha       r10, 0x148 (r29)
extsh     r9,r31
cmpw      r9,r10
lwz       r8, 0x0 (r29)
lwz       r8, 0x4 (r8)
lwz       r9, 0x8 (r8)
ori       r9, r9, 0x80 # bit must be set for offroad immunity
stw       r9, 0x8 (r8)
ble       end
sth       r31, 0x148 (r29)
end:
andi.     r0, r0, 0x4 # beq after hook
.balign   8
realend:

.long 0x04000000+KartMoveReleaseMt-0x80000000+0x14C
lha       r0, 0x110 (r29)

.long 0x04000000+KartMoveReleaseMt-0x80000000+0x164
sth       r31, 0x110 (r29)

.long 0x04000000+KartMoveReleaseMt-0x80000000+0x16c
ori       r0, r0, 0x4

The mkw-sp ghidra is super helpful

[Vega]

Nice work.