Requirements:
WiiScrubber v1.40;
nfs2iso2nfs v0.5.4; it may require the Wii common Key. You can use wiiscrubber's key.bin renamed to wii_common_key.bin.
A clean rip of your Wii game;
The extracted contents of a Wii VC title for the Wii U (except the .nfs files);
-the 2 below require java to be installed-
jnustool (requires Wii U common key so you'll have to search online - hint: it begins with D7B0. Open the "config" file in notepad and paste the key inside, replacing [COMMONKEY]);
NUSpacker (must be @ihaveamac's version, requires Wii U common key as well)

Current limitations:
It's possible to use the gamepad to emulate ONLY the Classic Controller.
Wii Remote emulation is possible but there's no gyroscope or infrared commands (at least for now).
(Input emulation patches by @FIX94)

The game must be already compatible with the Classic Controller but that isn't a guarantee that it's going to work.
Here's a compatibility list: http://wiki.gbatemp.net/wiki/WiiU_VC_Wii_inject_compatibility_list

Integrity checks are still in place so only clean disc rips work.
The game iso must be pristine: untrimmed, unscrubbed and the partitions signed.
No homebrew, no mods, no wimmfi patched games until sigpatches are implemented.
Patched isos work now! Original idea by @Tock46!

Homebrew works now, even a special version of Nintendont by @FIX94

Trimmed isos still don't work, at least not isos trimmed by WiiScrubber.



HOW TO DO IT


0. Downloading a Wii VC Title
This may be illegal and I'm just telling you so you don't ever do it by mistake OK?
You can use the command line to download games' contents directly if you know the title id and title key.
I heard you can get them on a certain titlekeys site...

Once you have that, this is the command

java -jar JNUSTool.jar TITLEID TITLEKEY

Note: You should get a game that contains the latest revision of fw.img (r590), that's the only version supported by @FIX94's patches.
Here's some info you can use to verify that you have a good file:
Size: 1785497 bytes.
CRC32: E2F27E9B
MD5: 3CAF52A9A440EEE4F125A3AD22E305C8
SHA: A5A75EBF3164874830A1D5992495DE510AB3F74E

Now here's a list of some titles that contain the preferred fw.img (verified mostly by @fejich and @markehmus)
DONKEY KONG JUNGLE BEAT [VBXE01]
Kirby's Epic Yarn [VARE01]
Lost in Shadow [VA8E01]
Mario Strikers Charged [VBFE01]
Mario Super Sluggers [VBHE01]
Pandora's Tower [VAPE01]
PIKMIN 2 [VBTE01]
PIKMIN [VBUE01]
Resident Evil 4 Wii Edition [VBDE01]
Resident Evil The Umbrella Chronicles [VBWE01]
Rhythm Heaven Fever [VAKE01]
Sin and Punishment Star Successor [VALE01]
Super Mario Galaxy [VBKJ01]
Super Paper Mario [VBBE01]
The Legend of Zelda Skyward Sword [VANE01]
Trauma Team [VA6E01]
Wario Land Shake It [VBGE01]
WARIO WARE SMOOTH MOVES [VBVE01]





-----------------------------------------------

1. WiiScrubber
First setup WiiScrubber. Remember it needs the Wii common keys so run MakeKeyBin.exe first and do as it says.
Run it and open you iso. Right-click the UPDATE partition and select "Delete partition". Confirm.

Now click on the + box to expand the DATA partition, then expand partition.bin.
Right click tmd.bin, select "Extract" and save it.
Do the same with ticket.bin.

Rename the extracted ticket.bin to rvlt.tik
Rename the extracted tmd.bin to rvlt.tmd

Copy/move both files to the "code" folder of the Wii VC title.

Your iso is now ready and you can close WiiScrubber.


2. nfs2iso2nfs
Move your iso to the "content" folder of the Wii VC. Rename the file to "game.iso".
The content folder should contain only game.iso and the "assets" folder. Delete any nfs files that are still present.

Copy nfs2iso2nfs.exe to the content folder and run it. If everything is in place, it will begin the conversion process.
It should take around 15 minutes. Its console window will close when it's finished.
Once it ends you can delete your iso file and nfs2iso2nfs.exe (and wii_common_key.bin if it exists).
The content folder should contain only the nfs files and the "assets" folder.

Optional: You can enable Classic Controller emulation for playing using only the gamepad.
Open meta.xml (it's in the meta folder) in notepad.
Look for the line

<drc_use type="unsignedInt" length="4">1</drc_use>

replace it with

<drc_use type="unsignedInt" length="4">65537</drc_use>

and save the file.
Note that this will only work if the game supports the Classic Controller.
If it doesn't either it won't boot or you won't be able to do anything and only the gamepad's power button will work.
Here's a list of such games: https://wiki.gbatemp.net/wiki/List_of_Wii_games_compatible_with_Classic_Controller


3.NUSpacker
The final part, building the installation files.
NUSpacker requires the Wii U common key. You should find it online and then open the file "encryptKeyWith" with
notepad and paste the key inside (hint: it begins with D7B0)

It's also a command line tool so you'll have to write down the commands, or simply create a new text file,
write the command inside, save it and change the extension from .txt to .bat

I recommend copying the Wii VC folder (that contains the other 3 folders, code, content and meta) to nuspacker's folder.
That will make everything easier.

The command works like this (replace with the names of your own folders)
If you folders have spaces in their names, enclose them in quotation marks, like "Just Dance".

java -jar nuspacker.jar -in GAME_FOLDER -out INSTALATION_FILES_FOLDER

Wiait until it finishes the process.
Now just copy the folder with the installation data to the "install" folder SD card, run a CFW and install it with WUP Installer GX2!

PS: If you make a nonfunctional game, remember to uninstall it before trying again.
If you install a fiunctional game over a broken installation, it will still appear as broken.

 

[wicksand420]

yep. thats about what happend after gerbilsoft made that one update, it broke like that, I remember even after allowing selection again it just crashed so he must've fucked up much more than just that.

Did you know if you hold plus and press the dpad up or down it changes the brightness on the gamepad?

 

[Shadow Fyre]

So I have a couple questions:

1. Does this mean we install the GC game using WUP installer, meaning we can install to USB? This would be great considering my sd is running out of room.

2. Is there gamecube adapter support yet? I remember reading only the gamepad was working as a single player controller for now.

3. Do the games run by launching the Nintendont forwarder, or is Nintendont automatically launched when we run the game?

 

[wicksand420]

1. you can run as many compatible games as you want from sd card, and one from the wup nintendont forwarder
2. no idea, dont have one to test
3. you launch the forwarder and then select the games from your sd

 

[Shadow Fyre]

1. you can run as many compatible games as you want from sd card, and one from the wup nintendont forwarder
2. no idea, dont have one to test
3. you launch the forwarder and then select the games from your sd

Damn I had the wrong idea, I thought this installed the games to the wii u's memory as a Wii VC.

 

[cucholix]

1. you can run as many compatible games as you want from sd card, and one from the wup nintendont forwarder
2. no idea, dont have one to test
3. you launch the forwarder and then select the games from your sd

I though the iso was already in the wup?

 

[FIX94]

Damn I had the wrong idea, I thought this installed the games to the wii u's memory as a Wii VC.

it does, one at a time. per wii vc channel you can include one game.

 

[wicksand420]

a gc iso inside a wii iso inside a wii u installer
Its the turduckin of games

 

[cucholix]

it does, one at a time. per wii vc channel you can include one game.

So no need to store the iso on the SD? Only nintendont loader?

What about settings like forcing 4:3, gcn boot bios, they are included in the wup too or nintendont folder in the SD?

 

[Shadow Fyre]

it does, one at a time. per wii vc channel you can include one game.

Sweet. Okay then, that means if we change the ID we can use the same wii vc channel for each game. This sounds perfect.

edit: I want to do this and test if the gamecube adapter works. might take a while since I have a shitload of college work to do.

 

[FIX94]

What about settings like forcing 4:3, gcn boot bios, they are included in the wup too or nintendont folder in the SD?

nintendont itself and its setting are still on sd, basically in nintendont the stored game acts like a real gamecube disc on wii would (as it was the easiest for me to implement, just needed to modify my wii code) so to nintendont its read only and it requires at least a sd inserted to store its settings and emulated memory card on.

 

[wicksand420]

Can this be set to autoboot the included game.iso?

 

[Shadow Fyre]

nintendont itself and its setting are still on sd, basically in nintendont the stored game acts like a real gamecube disc on wii would (as it was the easiest for me to implement, just needed to modify my wii code) so to nintendont its read only and it requires at least a sd inserted to store its settings and emulated memory card on.

goddamn man I could kiss you.

Can this be set to autoboot the included game.iso?

Wouldn't it do that already?

 

[wicksand420]

goddamn man I could kiss you.


Wouldn't it do that already?

No, you have to select the game

 

[FIX94]

so my plan for that is to write a forwarder dol that autoboots the disc like a usb loader would autoboot its games in nintendont, just wait for a bit.

 

[Shadow Fyre]

I'm wondering if it's possible to have the Wii VC channels point to a different installation of Nintendont. If the gamecube adapter doesn't work then it'll only support single player games, so I'll keep all my multiplayers games on the sd card. And last time I checked the latest release doesn't support games on sd and the Wii VC channel installations. Am i making sense?

 

[wicksand420]

Damn man, how many irons you got in that fire?

 

[A Plus Ric]

I must be doing something wrong I get an error every time I try to install it lol

 

[wicksand420]

I'm wondering if it's possible to have the Wii VC channels point to a different installation of Nintendont. If the gamecube adapter doesn't work then it'll only support single player games, so I'll keep all my multiplayers games on the sd card. And last time I checked the latest release doesn't support games on sd and the Wii VC channel installations. Am i making sense?

I believe you can include the nintendont dol file instead of the forwarder, so you can load whichever version you need per vc channel

 

[FIX94]

OK so I would think this forwarder would work, it does boot a gamecube disc inserted in my wii just fine.
https://mega.nz/#!5tRwiTbJ!6axfscqtRdXnqBdJDH3LXQ9mRsnumJzXGP3MjEg1dIE
When building your wii vc if you replace the main.dol in the sys folder with this one (renamed of course) then it should autoboot the integrated "game.iso" in the wii vc files folder, only thing is that you cant cancel out of the autoboot so to change nintendonts settings you still would want a 2nd channel that actually just boots normally into nintendont to change them.

 

[Kleyon]

OK so I would think this forwarder would work, it does boot a gamecube disc inserted in my wii just fine.
https://mega.nz/#!5tRwiTbJ!6axfscqtRdXnqBdJDH3LXQ9mRsnumJzXGP3MjEg1dIE
When building your wii vc if you replace the main.dol in the sys folder with this one (renamed of course) then it should autoboot the integrated "game.iso" in the wii vc files folder, only thing is that you cant cancel out of the autoboot so to change nintendonts settings you still would want a 2nd channel that actually just boots normally into nintendont to change them.

nincfg.bin couldn't be edited directly from PC using any software?