Instructions
Start the "WWII Aces" game and wait for the main menu to load.
Press the "Wii Home" button. Press "1" and "2" at the same time on both Wii Remotes to reset their connection and activate them for the game. Press the "Home" button again to return to the game.
Go to the "Mission" menu if you want to play missions. Select to "Load" or start a "New" campaign.
Press the "Plus" button on the second player's remote at the plane select screen. You will see a "Player 2" icon appear on the screen. Have the second player select the plane they want to use. Once selected, the mission will start with a split screen and two players.
Select the "Dog Fighting" mode. After you select the arena, have the second player press the "Plus" button at the plane select screen. Use the Wii remote to select the plane. Now you will both be against each other in this mode and the last surviving plane wins.