General
1. On both Wii U Consoles, go to System Settings > Internet > Connect to the Internet 2. Press Y and select Wired Connection. Connect the LAN Adapter to the Wii U Consoles and press OK. 3. A communication test will begin and fail. Press OK to see the error results. 4. Press X to load up the Internet Connection Setup and go into the details of the connection 5. Tab right and select IP Address. Select Do not auto-obtain and enter the following values
Console #1
| IP | 192.168.000.001 |
| Subnet Mask | 255.255.255.000 |
| Gateway | 192.168.000.050 |
Console #2
| IP | 192.168.000.002 |
| Subnet Mask | 255.255.255.000 |
| Gateway | 192.168.000.050 |
6. The Wii U will ask you to set up DNS servers. Select Do not auto-obtain and enter the following value Primary DNS: 001.000.000.000
| Primary DNS | 001.000.000.000 |
7. Press B and save the settings. Do not run a connection test Load up the game and activate LAN Battle 8. Load up the game and activate LAN Battle (See below).
LAN Battle Mode
To start up LAN Battle mode press: [Start] while holding down [L Button] + [R Button] + [Down on the +Control Pad].
Reference
http://www.serebii.net/pokken/lanbattle.shtml
http://www.pokkentournament.com/en-us/article/?id=pokken-tournament-lan-mode