To disable notifications, you need to turn the notification in the game options or in your device settings.

In-game option
1. In the game, tap the [Option] button (an icon that looks like a gear)
2. Tap the [Bell] icon to disable notifications.

iOS device settings
1. Go to [Settings]
2. In the apps list, scroll down to find PokoPoko and select
3. Select [Notifications]
4. Disable [Allow Notifications]

Android device settings
1. Go to [Settings]
2. Select [Apps]
3. In the apps list, scroll down to find PokoPoko
4. Disable [Show notifications]