Possibly a damage bonus being added:

[1]08018AE8
R00=00000063 R04=0202bde0 R08=0000000b R12=0203a470
R01=00000000 R05=0203a3f0 R09=00000000 R13=03007cec
R02=00000000 R06=0202bde0 R10=00000000 R14=08018ae1
R03=08be222c R07=0202bde0 R11=03007dfc R15=08018ae8
CPSR=0000003f (......T Mode: 1f)
08018ae6  1840 add r0, r0, r1

Move Strength to 203a404

[5]080285F6
R00=00000063 R04=00000000 R08=0000000b R12=0203a470
R01=080285f5 R05=0203a3f0 R09=00000000 R13=03007cf4
R02=00000000 R06=0202bde0 R10=00000000 R14=08018ae1
R03=08be222c R07=0202bde0 R11=03007dfc R15=080285f6
CPSR=0000003f (......T Mode: 1f)
080285f4  7528 strb r0, [r5, #0x14]

Load Weapon Mt

[1]08028B5C
R00=00000063 R04=0203a470 R08=0000000b R12=0203a470
R01=0203a44a R05=0203a3f0 R09=00000000 R13=03007ce8
R02=08c97eac R06=0203a438 R10=00000000 R14=08028b3b
R03=00000002 R07=0202bde0 R11=03007dfc R15=08028b5c
CPSR=0000003f (......T Mode: 1f)
08028b5a  880a ldrh r2, [r1, #0x0]

Add Weapon Mt

[2]08028B5E
R00=00000063 R04=0203a470 R08=0000000b R12=0203a470
R01=0203a44a R05=0203a3f0 R09=00000000 R13=03007ce8
R02=00000008 R06=0203a438 R10=00000000 R14=08028b3b
R03=00000002 R07=0202bde0 R11=03007dfc R15=08028b5e
CPSR=0000003f (......T Mode: 1f)
08028b5c  1810 add r0, r2, r0

Save new Atk to 203a44a

[3]08028B60
R00=0000006b R04=0203a470 R08=0000000b R12=0203a470
R01=0203a44a R05=0203a3f0 R09=00000000 R13=03007ce8
R02=00000008 R06=0203a438 R10=00000000 R14=08028b3b
R03=00000002 R07=0202bde0 R11=03007dfc R15=08028b60
CPSR=0000003f (......T Mode: 1f)
08028b5e  8008 strh r0, [r1, #0x0]

Move R3 to R1...

[1]0801DF82
R00=0000006b R04=02025554 R08=0000000b R12=0203a470
R01=08be2394 R05=02025586 R09=00000000 R13=03007d60
R02=0203a3f0 R06=0202bde0 R10=00000000 R14=08028561
R03=0203a470 R07=0000000f R11=03007dfc R15=0801df82
CPSR=0000003f (......T Mode: 1f)
0801df80  1c19 add r1, r3, #0x0

And add to R1 in order to...

[2]0801DF84
R00=0000006b R04=02025554 R08=0000000b R12=0203a470
R01=0203a470 R05=02025586 R09=00000000 R13=03007d60
R02=0203a3f0 R06=0202bde0 R10=00000000 R14=08028561
R03=0203a470 R07=0000000f R11=03007dfc R15=0801df84
CPSR=0000003f (......T Mode: 1f)
0801df82  315a add r1, #0x5a

Store Atk to 203a4ca

[3]0801DF86
R00=0000006b R04=02025554 R08=0000000b R12=0203a470
R01=0203a4ca R05=02025586 R09=00000000 R13=03007d60
R02=0203a3f0 R06=0202bde0 R10=00000000 R14=08028561
R03=0203a470 R07=0000000f R11=03007dfc R15=0801df86
CPSR=0000003f (......T Mode: 1f)
0801df84  8008 strh r0, [r1, #0x0]

Then, move R2 to R0 in order to...

[1]08028A52
R00=00000000 R04=03007cf4 R08=02025585 R12=0203a470
R01=0203a44a R05=0203a3f0 R09=0202bde0 R13=03007cf4
R02=0000006b R06=00000000 R10=00000000 R14=08026a39
R03=02025585 R07=0202bde0 R11=03007dfc R15=08028a52
CPSR=0000003f (......T Mode: 1f)
08028a50  1810 add r0, r2, r0

Store Atk back to 203a44a

[2]08028A54
R00=0000006b R04=03007cf4 R08=02025585 R12=0203a470
R01=0203a44a R05=0203a3f0 R09=0202bde0 R13=03007cf4
R02=0000006b R06=00000000 R10=00000000 R14=08026a39
R03=02025585 R07=0202bde0 R11=03007dfc R15=08028a54
CPSR=0000003f (......T Mode: 1f)
08028a52  8008 strh r0, [r1, #0x0]

Some weird penalty

R00=00000001 R04=0203a3f0 R08=02025585 R12=0203a470
R01=0000000f R05=0203a438 R09=0202bde0 R13=03007d14
R02=0203a44a R06=00000000 R10=00000000 R14=08028521
R03=00000003 R07=0202bde0 R11=03007dfc R15=08028536
CPSR=2000003f (..C...T Mode: 1f)
08028534  1a08 sub r0, r1, r0


Move Atk to 203a3de

[1]0802923E
R00=00000073 R04=0203a3f0 R08=0203a470 R12=00000042
R01=0203a470 R05=0203a470 R09=00000000 R13=03007d24
R02=0203a3d8 R06=0203a470 R10=00000000 R14=080294f9
R03=0203a3f0 R07=00000000 R11=03007dfc R15=0802923e
CPSR=0000003f (......T Mode: 1f)
0802923c  80d0 strh r0, [r2, #0x6]

Load enemy defense

[1]08029298
R00=01000000 R04=0203a3d8 R08=0203a470 R12=00000042
R01=00000073 R05=00000000 R09=00000000 R13=03007d14
R02=00000025 R06=0203a3f0 R10=00000000 R14=08000e0d
R03=00000000 R07=00000000 R11=03007dfc R15=08029298
CPSR=2000003f (..C...T Mode: 1f)
08029296  8922 ldrh r2, [r4, #0x8]

Subtract enemy defense from damage

[2]0802929A
R00=01000000 R04=0203a3d8 R08=0203a470 R12=00000042
R01=00000073 R05=00000000 R09=00000000 R13=03007d14
R02=00000009 R06=0203a3f0 R10=00000000 R14=08000e0d
R03=00000000 R07=00000000 R11=03007dfc R15=0802929a
CPSR=2000003f (..C...T Mode: 1f)
08029298  1a88 sub r0, r1, r2

Store damage to 203a3dc

[3]0802929C
R00=0000006a R04=0203a3d8 R08=0203a470 R12=00000042
R01=00000073 R05=00000000 R09=00000000 R13=03007d14
R02=00000009 R06=0203a3f0 R10=00000000 R14=08000e0d
R03=00000000 R07=00000000 R11=03007dfc R15=0802929c
CPSR=2000003f (..C...T Mode: 1f)
0802929a  80a0 strh r0, [r4, #0x4]

Move and double attack to make critical bonus

[1]080292E6
R00=00000004 R04=0203a3d8 R08=0203a470 R12=00000042
R01=0000006a R05=00000000 R09=00000000 R13=03007d14
R02=00000000 R06=0203a3f0 R10=00000000 R14=08000e0d
R03=00000000 R07=00000000 R11=03007dfc R15=080292e6
CPSR=0000003f (......T Mode: 1f)
080292e4  0048 lsl r0, r1, #0x01

Add Critical Hit bonus

[2]080292E8
R00=000000d4 R04=0203a3d8 R08=0203a470 R12=00000042
R01=0000006a R05=00000000 R09=00000000 R13=03007d14
R02=00000000 R06=0203a3f0 R10=00000000 R14=08000e0d
R03=00000000 R07=00000000 R11=03007dfc R15=080292e8
CPSR=0000003f (......T Mode: 1f)
080292e6  1840 add r0, r0, r1

Store critical damage to 203a3dc

[3]080292EA
R00=0000013e R04=0203a3d8 R08=0203a470 R12=00000042
R01=0000006a R05=00000000 R09=00000000 R13=03007d14
R02=00000000 R06=0203a3f0 R10=00000000 R14=08000e0d
R03=00000000 R07=00000000 R11=03007dfc R15=080292ea
CPSR=0000003f (......T Mode: 1f)
080292e8  80a0 strh r0, [r4, #0x4]

Prepare R1...

[4]080292EC
R00=0000013e R04=0203a3d8 R08=0203a470 R12=00000042
R01=0000006a R05=00000000 R09=00000000 R13=03007d14
R02=00000000 R06=0203a3f0 R10=00000000 R14=08000e0d
R03=00000000 R07=00000000 R11=03007dfc R15=080292ec
CPSR=0000003f (......T Mode: 1f)
080292ea  490d ldr r1, [$08029320] (=$0203a3d8)

and R2, in order to...

[5]080292EE
R00=0000013e R04=0203a3d8 R08=0203a470 R12=00000042
R01=0203a3d8 R05=00000000 R09=00000000 R13=03007d14
R02=00000000 R06=0203a3f0 R10=00000000 R14=08000e0d
R03=00000000 R07=00000000 R11=03007dfc R15=080292ee
CPSR=0000003f (......T Mode: 1f)
080292ec  2204 mov r2, #0x4

Reload damage (pointless, much?)

[6]080292F0
R00=0000013e R04=0203a3d8 R08=0203a470 R12=00000042
R01=0203a3d8 R05=00000000 R09=00000000 R13=03007d14
R02=00000004 R06=0203a3f0 R10=00000000 R14=08000e0d
R03=00000000 R07=00000000 R11=03007dfc R15=080292f0
CPSR=0000003f (......T Mode: 1f)
080292ee  5e88 ldsh r0, [r1, r2]

Check if damage is less than 127

[7]080292F2
R00=0000013e R04=0203a3d8 R08=0203a470 R12=00000042
R01=0203a3d8 R05=00000000 R09=00000000 R13=03007d14
R02=00000004 R06=0203a3f0 R10=00000000 R14=08000e0d
R03=00000000 R07=00000000 R11=03007dfc R15=080292f2
CPSR=0000003f (......T Mode: 1f)
080292f0  287f cmp r0, #0x7f

It isn't...

[8]080292F4
R00=0000013e R04=0203a3d8 R08=0203a470 R12=00000042
R01=0203a3d8 R05=00000000 R09=00000000 R13=03007d14
R02=00000004 R06=0203a3f0 R10=00000000 R14=08000e0d
R03=00000000 R07=00000000 R11=03007dfc R15=080292f4
CPSR=0000003f (..C...T Mode: 1f)
080292f2  dd01 ble $080292f8

So make it 127

[9]080292F6
R00=0000013e R04=0203a3d8 R08=0203a470 R12=00000042
R01=0203a3d8 R05=00000000 R09=00000000 R13=03007d14
R02=00000004 R06=0203a3f0 R10=00000000 R14=08000e0d
R03=00000000 R07=00000000 R11=03007dfc R15=080292f6
CPSR=0000003f (..C...T Mode: 1f)
080292f4  207f mov r0, #0x7f

And put it back to 203a3dc

[10]080292F8
R00=0000007f R04=0203a3d8 R08=0203a470 R12=00000042
R01=0203a3d8 R05=00000000 R09=00000000 R13=03007d14
R02=00000004 R06=0203a3f0 R10=00000000 R14=08000e0d
R03=00000000 R07=00000000 R11=03007dfc R15=080292f8
CPSR=0000003f (..C...T Mode: 1f)
080292f6  8088 strh r0, [r1, #0x4]

Make sure R2 is still 4...oh, look, it already is. Oh well.

[11]080292FA
R00=0000007f R04=0203a3d8 R08=0203a470 R12=00000042
R01=0203a3d8 R05=00000000 R09=00000000 R13=03007d14
R02=00000004 R06=0203a3f0 R10=00000000 R14=08000e0d
R03=00000000 R07=00000000 R11=03007dfc R15=080292fa
CPSR=0000003f (..C...T Mode: 1f)
080292f8  2204 mov r2, #0x4

Reload damage again...(redundant?)

{Weird phase start}
[12]080292FC
R00=0000007f R04=0203a3d8 R08=0203a470 R12=00000042
R01=0203a3d8 R05=00000000 R09=00000000 R13=03007d14
R02=00000004 R06=0203a3f0 R10=00000000 R14=08000e0d
R03=00000000 R07=00000000 R11=03007dfc R15=080292fc
CPSR=0000003f (..C...T Mode: 1f)
080292fa  5e88 ldsh r0, [r1, r2]
[13]080292FE
R00=0000007f R04=0203a3d8 R08=0203a470 R12=00000042
R01=0203a3d8 R05=00000000 R09=00000000 R13=03007d14
R02=00000004 R06=0203a3f0 R10=00000000 R14=08000e0d
R03=00000000 R07=00000000 R11=03007dfc R15=080292fe
CPSR=0000003f (..C...T Mode: 1f)
080292fc  2800 cmp r0, #0x0
[14]08029300
R00=0000007f R04=0203a3d8 R08=0203a470 R12=00000042
R01=0203a3d8 R05=00000000 R09=00000000 R13=03007d14
R02=00000004 R06=0203a3f0 R10=00000000 R14=08000e0d
R03=00000000 R07=00000000 R11=03007dfc R15=08029300
CPSR=0000003f (..C...T Mode: 1f)
080292fe  da01 bge $08029304
[15]08029306
R00=0000007f R04=0203a3d8 R08=0203a470 R12=00000042
R01=0203a3d8 R05=00000000 R09=00000000 R13=03007d14
R02=00000004 R06=0203a3f0 R10=00000000 R14=08000e0d
R03=00000000 R07=00000000 R11=03007dfc R15=08029306
CPSR=0000003f (..C...T Mode: 1f)
08029304  2204 mov r2, #0x4
[16]08029308
R00=0000007f R04=0203a3d8 R08=0203a470 R12=00000042
R01=0203a3d8 R05=00000000 R09=00000000 R13=03007d14
R02=00000004 R06=0203a3f0 R10=00000000 R14=08000e0d
R03=00000000 R07=00000000 R11=03007dfc R15=08029308
CPSR=0000003f (..C...T Mode: 1f)
08029306  5e88 ldsh r0, [r1, r2]

Check if damage is 0

[17]0802930A
R00=0000007f R04=0203a3d8 R08=0203a470 R12=00000042
R01=0203a3d8 R05=00000000 R09=00000000 R13=03007d14
R02=00000004 R06=0203a3f0 R10=00000000 R14=08000e0d
R03=00000000 R07=00000000 R11=03007dfc R15=0802930a
CPSR=0000003f (..C...T Mode: 1f)
08029308  2800 cmp r0, #0x0
[18]0802930C
R00=0000007f R04=0203a3d8 R08=0203a470 R12=00000042
R01=0203a3d8 R05=00000000 R09=00000000 R13=03007d14
R02=00000004 R06=0203a3f0 R10=00000000 R14=08000e0d
R03=00000000 R07=00000000 R11=03007dfc R15=0802930c
CPSR=0000003f (..C...T Mode: 1f)
0802930a  d003 beq $08029314

If not, replace R1 with R6

[19]0802930E
R00=0000007f R04=0203a3d8 R08=0203a470 R12=00000042
R01=0203a3d8 R05=00000000 R09=00000000 R13=03007d14
R02=00000004 R06=0203a3f0 R10=00000000 R14=08000e0d
R03=00000000 R07=00000000 R11=03007dfc R15=0802930e
CPSR=0000003f (..C...T Mode: 1f)
0802930c  1c31 add r1, r6, #0x0
[20]08029310
R00=0000007f R04=0203a3d8 R08=0203a470 R12=00000042
R01=0203a3f0 R05=00000000 R09=00000000 R13=03007d14
R02=00000004 R06=0203a3f0 R10=00000000 R14=08000e0d
R03=00000000 R07=00000000 R11=03007dfc R15=08029310
CPSR=0000003f (......T Mode: 1f)
0802930e  317c add r1, #0x7c
[21]08029312
R00=0000007f R04=0203a3d8 R08=0203a470 R12=00000042
R01=0203a46c R05=00000000 R09=00000000 R13=03007d14
R02=00000004 R06=0203a3f0 R10=00000000 R14=08000e0d
R03=00000000 R07=00000000 R11=03007dfc R15=08029312
CPSR=0000003f (......T Mode: 1f)
08029310  2001 mov r0, #0x1

Then, put a 1 into R6 plus 7c

[22]08029314
R00=00000001 R04=0203a3d8 R08=0203a470 R12=00000042
R01=0203a46c R05=00000000 R09=00000000 R13=03007d14
R02=00000004 R06=0203a3f0 R10=00000000 R14=08000e0d
R03=00000000 R07=00000000 R11=03007dfc R15=08029314
CPSR=0000003f (......T Mode: 1f)
08029312  7008 strb r0, [r1, #0x0]
{Weird phase end}

Load enemy health from 203a483

[80]08029442
R00=00000000 R04=0203a438 R08=0203a470 R12=00000042
R01=0203a3d8 R05=0203a3f0 R09=00000000 R13=03007d10
R02=00000013 R06=0203a50c R10=00000000 R14=080293f5
R03=00000000 R07=0203a470 R11=03007dfc R15=08029442
CPSR=0000003f (......T Mode: 1f)
08029440  56ba ldrh r2, [r7, r2]

Ready R3 to...

[81]08029444
R00=00000000 R04=0203a438 R08=0203a470 R12=00000042
R01=0203a3d8 R05=0203a3f0 R09=00000000 R13=03007d10
R02=0000001c R06=0203a50c R10=00000000 R14=080293f5
R03=00000000 R07=0203a470 R11=03007dfc R15=08029444
CPSR=0000003f (......T Mode: 1f)
08029442  2304 mov r3, #0x4

Load damage from 203a3dc

[82]08029446
R00=00000000 R04=0203a438 R08=0203a470 R12=00000042
R01=0203a3d8 R05=0203a3f0 R09=00000000 R13=03007d10
R02=0000001c R06=0203a50c R10=00000000 R14=080293f5
R03=00000004 R07=0203a470 R11=03007dfc R15=08029446
CPSR=0000003f (......T Mode: 1f)
08029444  5ec8 ldsh r0, [r1, r3]

Check if damage is less than remaining enemy HP

[83]08029448
R00=0000007f R04=0203a438 R08=0203a470 R12=00000042
R01=0203a3d8 R05=0203a3f0 R09=00000000 R13=03007d10
R02=0000001c R06=0203a50c R10=00000000 R14=080293f5
R03=00000004 R07=0203a470 R11=03007dfc R15=08029448
CPSR=0000003f (......T Mode: 1f)
08029446  4290 cmp r0, r2

It isn't, so...

[84]0802944A
R00=0000007f R04=0203a438 R08=0203a470 R12=00000042
R01=0203a3d8 R05=0203a3f0 R09=00000000 R13=03007d10
R02=0000001c R06=0203a50c R10=00000000 R14=080293f5
R03=00000004 R07=0203a470 R11=03007dfc R15=0802944a
CPSR=0000003f (..C...T Mode: 1f)
08029448  dd00 ble $0802944c

Store enemy health as damage to 203a3dc instead

[85]0802944C
R00=0000007f R04=0203a438 R08=0203a470 R12=00000042
R01=0203a3d8 R05=0203a3f0 R09=00000000 R13=03007d10
R02=0000001c R06=0203a50c R10=00000000 R14=080293f5
R03=00000004 R07=0203a470 R11=03007dfc R15=0802944c
CPSR=0000003f (..C...T Mode: 1f)
0802944a  808a strh r2, [r1, #0x4]

Load enemy health

[86]0802944E
R00=0000007f R04=0203a438 R08=0203a470 R12=00000042
R01=0203a3d8 R05=0203a3f0 R09=00000000 R13=03007d10
R02=0000001c R06=0203a50c R10=00000000 R14=080293f5
R03=00000004 R07=0203a470 R11=03007dfc R15=0802944e
CPSR=0000003f (..C...T Mode: 1f)
0802944c  7cfa ldrb r2, [r7, #0x13]

Load damage

[87]08029450
R00=0000007f R04=0203a438 R08=0203a470 R12=00000042
R01=0203a3d8 R05=0203a3f0 R09=00000000 R13=03007d10
R02=0000001c R06=0203a50c R10=00000000 R14=080293f5
R03=00000004 R07=0203a470 R11=03007dfc R15=08029450
CPSR=0000003f (..C...T Mode: 1f)
0802944e  7909 ldrb r1, [r1, #0x4]

Damage is dealt

[88]08029452
R00=0000007f R04=0203a438 R08=0203a470 R12=00000042
R01=0000001c R05=0203a3f0 R09=00000000 R13=03007d10
R02=0000001c R06=0203a50c R10=00000000 R14=080293f5
R03=00000004 R07=0203a470 R11=03007dfc R15=08029452
CPSR=0000003f (..C...T Mode: 1f)
08029450  1a50 sub r0, r2, r1

Then HP is saved to 203a483

[89]08029454
R00=00000000 R04=0203a438 R08=0203a470 R12=00000042
R01=0000001c R05=0203a3f0 R09=00000000 R13=03007d10
R02=0000001c R06=0203a50c R10=00000000 R14=080293f5
R03=00000004 R07=0203a470 R11=03007dfc R15=08029454
CPSR=0000003f (.ZC...T Mode: 1f)
08029452  74f8 strb r0, [r7, #0x13]

Health is loaded from battle and stored into enemy

Breakpoint (on read) address 0203a483 byte:00
R00=00000000 R04=0202cf08 R08=00000000 R12=00000001
R01=0203a470 R05=0203a470 R09=00000000 R13=03007d70
R02=00000002 R06=0202cf08 R10=00000000 R14=08029ae3
R03=00000001 R07=0202bde0 R11=03007dfc R15=08029c36
CPSR=0000003f (......T Mode: 1f)
08029c34  74e0 strb r0, [r4, #0x13]
