The Rabbids Smart Brush game only works with the Kolibree connected toothbrush.
In order to connect your brush to the game, go to the Bluetooth settings on your phone, activate Bluetooth and put the toothbrush in discovery mode (press the button on the brush until the light flashes blue and then release it). The brush appears in the list of devices under the name “KLTB001_XXXXXX”. Select it to connect.
If this is the first time that you are connecting the toothbrush, you will be asked for a pairing code: 0000 (zero, zero, zero, zero).
When you return to the Rabbids Smart Brush game, the connection icon of the toothbrush at the top left of the screen indicates that the connection has been established.