Short Guide on How to Unlock the Secret Character Boon Marrabbio in Vampire Survivors.
To unlock Marrabbio, you will first require the Yellow Sign relic. If you haven't got it already, check out our guide on How To Unlock Yellow Sign.
You will have to go into the Mad Forest stage and open your map. On your map, you will see the Skull O'Maniac and Pummarola stage items. Your goal is to remove them from the stage. You can achieve this by going to them and picking them up (even if you discard them afterwards) or by obtaining them through leveling up and then maxing them out.
After successfully either removing the stage items or obtaining them and maxing them out, you will notice that Pies will start to appear on the floor and lead you to a specific part of the map. Following their trail will lead you somewhere left on the grid of the Hollow Heart and above the Metaglio Left passive items.
After you reach the end of the trail, a Shadowy Enemy will appear, whom you will have to kill, and after doing so, a short jingle will play, signaling to you that you have successfully unlocked the secret character Boon Marrabbio.
If you prefer, you can unlock Marrabbio using a cheat code. Simply access the Secrets menu, which you can find in the main menu if you've unlocked The Forbidden Scrolls Of Morbane. Then, enter the code 'fettinepanate' and you will have Marrabbio unlocked.