Please enlighten us. Share a link to these numerous DSI error posts and I'll show you people who are not using HaxChi correctly.
You didn't simply tell someone how it worked for you, you absolutely said that we were wrong and that you must have mocha. BS
If all these people are using HaxChi incorrectly, then getting first try installs with Mocha that's a problem with HaxChi either an error or poor design.
This works, do what you like.
1. Download the game files which contains 258 files, i renamed the '00050000101C9500' folder to 'Z1' (final version with the uncorrupted files should be 259 files, 10,551,280,012 bytes)
2. Download the .tik file and rename it to title.tik (be sure you have extensions enabled or you can mess up and rename it to title.tik.tik if your extensions are hidden)
3. Place the title.tik files in the game folder (you should now have 259 files with the tik added on)
4. Download the update (the one from MEGA) and put it in a folder named Z2
5. On your SD card you need to have a folder called 'install' where you will place the game folder and the update folder (name those 2 folders Z1=the actual game and Z2=update)
[Also installing on NAND is much quicker than USB]
6. Insert the SD card into the Wii U and turn it on
7. Run a CFW (Mocha doesn't require anything special to set up so use it if you don't have one)
8. Run homebrew channel → WUP install GUX → install the Z1 folder first.
9. For safe measure reboot and repeat steps 6,7 &8, but this time install Z2, the game update.
10. (Optional) Go to your internet settings of the WiiU → your connection and change the connection SSID name by adding a 0, that way your wiiu isn't connected once you start your gameplay just as a precaution so your WiiU doesn't get banned!
11. Once both files are installed press home, exit MiiMaker, start the game and have fun