Instructions
Select "Pokemon Rumble" from the main Wii menu.
Press "Start" to begin the game. Select your difficulty level.
Travel to the bottom part of the lobby and go up to the white house with two controllers. This is the multi-player option. Press "A" to select it.
Turn on the second player's Wii remote by pressing the power button.
Press "A" on the second controller to join the game. Select the second player's Pokemon and press start to begin the two-player game.