On opening usbloadergx from homebrew, I get message that IOS58 is required. Here is dump of SysCheck
SysCheck HDE v2.4.0 HacksDen Edition by JoostinOnline, Double_A, R2-D2199, and Nano
...runs on IOS36 (rev 1042).
Region: NTSC-U (original region: KOR)
System Menu 3.2U (v289)
Could not detect the drive date!
Homebrew Channel 1.0.1 running on IOS36
Hollywood v0x11
Console ID: 81170312
Console Type: Wii
Shop Channel Country: Korea (136)
Boot2 v3
Found 134 titles.
Found 25 IOS on this console. 1 of them are stubs.
IOS4 (rev 259): Stub
IOS9 (rev 516): Flash Access
IOS11 (rev 10): Trucha Bug, ES Identify, Flash Access, NAND Access
IOS12 (rev 6): Trucha Bug, ES Identify, Flash Access, NAND Access
IOS13 (rev 10): Trucha Bug, ES Identify, Flash Access, NAND Access
IOS14 (rev 257): Trucha Bug, ES Identify, Flash Access, NAND Access
IOS15 (rev 257): Trucha Bug, ES Identify, Flash Access, NAND Access
IOS16 (rev 257): Trucha Bug, ES Identify, Flash Access, NAND Access
IOS17 (rev 512): Trucha Bug, ES Identify, Flash Access, NAND Access
IOS20 (rev 12): Trucha Bug, ES Identify, Flash Access, NAND Access
IOS21 (rev 514): Trucha Bug, ES Identify, Flash Access, NAND Access
IOS22 (rev 772): Trucha Bug, ES Identify, Flash Access, NAND Access
IOS28 (rev 1288): Trucha Bug, ES Identify, Flash Access, NAND Access
IOS30 (rev 1040): Trucha Bug, ES Identify, Flash Access, NAND Access
IOS31 (rev 1040): Trucha Bug, ES Identify, Flash Access, NAND Access
IOS33 (rev 1040): Trucha Bug, ES Identify, Flash Access, NAND Access
IOS34 (rev 1039): Trucha Bug, ES Identify, Flash Access, NAND Access
IOS35 (rev 1040): Trucha Bug, ES Identify, Flash Access, NAND Access
IOS36 (rev 1042): Trucha Bug, ES Identify, Flash Access, NAND Access
IOS37 (rev 2070): ES Identify
IOS40 (rev 2321): ES Identify
IOS41 (rev 2320): ES Identify
IOS43 (rev 2320): ES Identify
IOS45 (rev 2320): ES Identify
IOS249 (rev 7): Trucha Bug, ES Identify, Flash Access, NAND Access
BC v2
MIOS v5
Report generated on 03/04/2018.