Wumiibo is a rewrite of the 3DS' nfc module, to allow for emulation of amiibo. As Wumiibo does not actually use nfc, this allows it you work on "old" 3DS family consoles, or consoles with Wireless Communication turned off or disabled.
Copy wumiibohelper.cia to the root of your SD card
Reinsert your SD card into your console
Launch FBI and select SD -> wumiibohelper.cia -> Install and delete CIA
Press A and wait for the CIA to install, then exit FBI
Power off your Console
While holding SELECT, power on your console to enter Luma3DS configuration
Ensure that "Enable loading external FIRMs and modules" and "Enable game patching" are selected
Press START to save and exit
Generating amiibo
Launch Wumiibo-Helper from the HOME Menu
Select "Generate amiibos for game"
Select a game from the list and then select an amiibo to generate
The amiibo will be generated and is now ready to be used
Registering amiibo
This section is not necessary for all games, but is recommended for full compatibility
Select HOME Menu Settings by tapping on the wrench icon in the top left
Scroll down and tap on "amiibo Settings"
Select "Register Owner and Nickname"
Press L+↓+START to open the Wumiibo Menu
Select Select a figure. -> <TitleID> -> <amiibo name>.bin
Fill in the required details and press Y to save
Wait for the amiibo to save and then press L+↓+START to open the Wumiibo Menu again
Select Force Stop Emulation.
Repeat steps 3-8 for the rest of the amiibo you want to register
Using amiibo in games
Launch an amiibo compatible game and navigate to the screen that asks you to place your amiibo on the screen
Press L+↓+START to open the Wumiibo Menu
Select Select a figure. -> <TitleID> -> <amiibo name>.bin
The amiibo will now be emulated, and act as though its always "on" the nfc reader
If the game asks to remove the amiibo, relaunch the Wumiibo Menu and select Force Stop Emulation.
Troubleshooting
Workaround for freezing games
If the game freezes or lags when trying to scan amiibo, do the following:
Navigate to the screen that asks you to place your amiibo on the screen
Press HOME to suspend the game
Press L+↓+START to open the Wumiibo Menu and select your amiibo
Reopen the suspended game
Using real figurines
Wumiibo doesn't work with real figurines, in order to use your physical amiibo again, do the following:
Launch Wumiibo-Helper from the HOME Menu
Select Toggle Wumiibo State
Press B to reboot
If disabling doesn't work make sure you dont have 2 versions of Wumiibo installed (see "Conflicting Wumiibo versions" below)
Repeat steps 1-3 to toggle Wumiibo back on
Conflicting Wumiibo versions
As of v4.2, Wumiibo has switched to a .CXI sysmodule supporting Luma3DS 13.0+, this means you may have two versions of Wumiibo installed to your system:
If you've installed Wumiibo previously, delete the 0004013000004002 folder in sd:/luma/titles/
Alternate menu combo
If one of your consoles buttons are broken download an alternate combo: