So as simply as I can explain:
You need NUSgrabber. At least this is your best bet. You can also use NEW-NUSgrabber out in this site, which is a package for NUSgrabber and a UI for it. Most people recommend NUSgrabber.
So I try to break this down as easy as I can. I am european and see you are swedish so let's start with example of... Starfox guard.
You first go to
http://wiiubrew.org/wiki/Title_database - this is one of the best sources for title information and also explains quite nicely what different Letter codes mean. (like 00050000 in first part of ID stands for a Full title, but 0005000E means an update, but is otherwise the exact same title ID, helps out later I promise)
So you press CTRL+F to search the page for... Star fox:
And we got a hit. Make sure you look the right most part of the columns and make sure the region of the game you want. In your case it is European, I am sure.
Now you copy this part; It is the TITLE ID which we so need:
After this; I assume you just get NUSgrabber because it shows the download progress/speed in somewhat nice fashion.
Put NusGrabber.exe in a folder you do not mind getting filled with random looking folders.
There he is!
Right click
WHILE HOLDING SHIFT-KEY without having any files highlighted in the folder, you should see choice to open a command prompt in this directory thing. Have a Finnish Lesson from me:
Open it up.
Just type in "nus" and press TAB, it should fill out automatically into "NUSgrabber.exe" - then press space, right click and past the title ID (in Windows 7 CTRL-V does not work in CMD, Win 10 it does, I think Win 8 it also pastes text into the prompt) we checked up earlier. Use the cursor in command prompt to go back a little and remove the separating dash in the ID:
Then hit enter and it will start downloading the files. In the end it does a move command and might say "something was not found" or whatever. This is normal, and just means it is done with everything. The Folder it downloads the game files you need to is same name as the title ID, so in this case our folder would be "00050000101BED00"
Inside these folders the contents look like this: (This is an example and I think it was a download I did not complete fully mind you)
You see you have the weird app h3 files and then title.cert, title.tmd and... title.tik nowhere to be found? Yes, at this point you seek out
that database and take the TIK that corresponds to the same region as your game, and put it in the folder with rest of the files. You now have 100% installable folder for your game. You can rename it now to something more helpful, say in this example, "STAIRFAWKS GARD" or something like that. Whatever fills your bowl.
You take this folder, and maybe any other such folders, and
MAYBE EVEN UPDATES - and copy them on your SD card SD:\install\STAIRFAWKS GUARD\ fashion. So you have individual folder inside install folder per thing you want to install.
here is where you need WUPinstaller:
https://gbatemp.net/threads/wupinstaller-y-mod-with-mulitple-install-folders.445907/
THIS DOES NOT DOWNLOAD GAMES IN ANY MANNER. it is an application for your Wii U (kinda like Loadiine but nothing like Loadiine) that handles installing these files on either your system storage, or to USB storage. The thread for the tool tells you enough how you should put it, and so on.
After you have the WUPinstaller on your SD card correctly, WITH Homebrew Launcher, and other apps I hope, you launch homebrew channel with any of your favorite web browser exploit ways, loadiine.ovh or self hosting, anything. Then you launch WUP installer, use UP/DOWN dpad to choose folders, right to mark them for install (* means "to install" etc) - and hit either A or X if you want to install them on your system or USB storage, and then it will boot into nice installation prompt and stuff happens. After this you can press HOME button to exit WUPinstaller, then HOME button to exit homebrew channel, then EXIT button in mii maker to get back to home menu and rejoice in glory of games in your home screen.
NOTES:
UPDATES: I said We will come back to this. Because you have blocked the updates in your console in one way or another, I presume, you cannot download game updates in the console as is either. but you CAN just download them with NUSgrabber. like I said earlier just take the first half of the ID and replace last 0 with E and it downloads the update data. UPDATE DATA ALREADY HAS A TIK FILE WHEN DOWNLOADED WITH NUSGRABBER. Just rename the folder after the download and install it too, to same place you installed your full game to and you have now the update there too, should work fine and dandy.
Also; There IS ready made packages for people like you on
that site so you just download extract and install no need for command prompt shenanigans. But I believe in teaching the man to fish rather than giving him the fish. Also knowing NUSgrabber is important anyway so you can get Updates for the games which many games desperately do need.
So to clarify for you:
WUPinstaller is for the WII U, uTikDownloadHelper is a utility to make downloading titles easier (ALTERNATIVE to NUSgrabber I went through in this post)
There right now is many ways to download the titles and I just happen to prefer the command line NUSgrabber. You CAN use uTikDOwnloadHelper if you want.
ALSO: MAKE SURE OF THE REGION, THIS METHOD IS NOT REGION FREE LIKE LOADIINE. It will not (likely?) Brick your console if you do get wrong region game but it will save you time to NOT download the wrong region stuff.
One way to get "easily" NUSgrabber.exe is to just download the NEW-Nusgrabber from here:
https://gbatemp.net/threads/download-the-new-nusgrabbergui.411228/
Then put it in a folder. Open it and keep it open, it will create NUSgrabber.exe in the same folder it is in (like you can see in my screenshot up there) and then you open the command prompt and whatnot.
And that is all. Inshallah my friend.
