Best Answer: Frenzy Mode is a special mode that automatically activates only when you have three of the same item in your item slots. Since it happens automatically, you don't need to do anything special to trigger it. While Frenzy Mode is active, you become invincible and have unlimited use of that specific item for a limited time.Get ready!: Mario Kart Tour for iOS (Free on the App Store)It's a me, Mario!: Mario Kart Tour for Android (Free on the Google Play Store)