1. reformat your wii and back up your saves to unban
OR
2. MAC Unban code
CODE[PAL]
C251D008 00000002
38A000XX 98A40005
38A00006 00000000
[NTSC_us]
C251C988 00000003
38A000XX 98A40005
38A00006 00000000
XX= not your real last MAC value (eg. 43 or 78 or 87 and so on)
If you don't understand how to obtain your real MAC address then put a random XX value and if it fails put another random XX value.
Source:
MDMwii's Forums[Mh3 codes]
OR
3. Monster Hunter Tri Online 10 Day / Error Code 20102 bypass
CODEMh-3 10 Day/Error Code 20102 Bypass (PAL) [Deathwolf , C|T]
C251D008 00000003
3A6000ZZ 9A640005
3A600000 38A00006
60000000 00000000
C2508DB4 00000002
3C60000X 6063XXXX
906DC9B8 00000000
C2509220 00000002
80C30004 38C600XX
90C30004 00000000
066F51D4 0000000D
00004D48 XXXXXXXX
XXXXXXXX XX000000
Mh-3 10 Day/Error Code 20102 Bypass (NTSC) [Deathwolf , C|T] ****NTSC Code Not Tested****
C251CFA4 00000003
3A6000ZZ 9A640005
3A600000 38A00006
60000000 00000000
C2508D50 00000002
3C60000X 6063XXXX
906DC9B8 00000000
C25091BC 00000002
80C30004 38C600XX
90C30004 00000000
066F5170 0000000D
00004D48 XXXXXXXX
XXXXXXXX XX000000
ZZ values:
00-99/AA-FF/0A/0F/0A/0F
XXXXX values :
00000-99999/AAAAA-FFFFF/A0A0A-F0F0F
XX values:
00-99/AA-FF/0A/0F/0A/0F
XXXXXXXX new Online-Support-Code
set your own support code:
XXXXXXXX values:
a = 61
b = 62
c = 63
d = 64
e = 65
f = 66
g = 67
h = 68
i = 69
j = 6A
K = 6B
l = 6c
m = 6D
n = 6E
o = 6F
p = 70
q = 71
r = 72
s = 73
t = 74
u = 75
v = 76
w = 77
x = 78
y = 79
z = 7A
0 = 30
1 = 31
2 = 32
3 = 33
4 = 34
5 = 35
6 = 36
7 = 37
8 = 38
9 = 39