How to Unlock and Defeat the Secret Boss for Turnip Boy Commits Tax Evasion

How to Unlock and Defeat the Secret Boss

In order to complete the game 100% you need to unlock and defeat the secret boss. You will not be able to fight this boss until you have found all the tax documents hidden around the map and ripped them up. You can check to see which ones you still have left to find by opening the menu and scrolling down the list of documents. Any documents that are labeled with '???' have yet to be found, and you will want to go back to that area of the map to locate it.

Once you have ripped up all the documents the cave that was previously blocked by guards in Rocky Ramp will now be unlocked and inside there will be a cat who will give you riddles to the whereabouts of any missing hats or artifacts. If you have them all you will find a heart container in the cave instead. You will now be able to unlock the secret boss by beating Mayor Onion again after the final credits have rolled.

Once you accomplished this, Mayor Onion will ascend, blowing up the nuclear bomb hidden in the basement of your greenhouse and becoming 'God Onion'. To defeat him you must kick bombs toward him while at the same time maneuvering away from the onslaught of attacks from him and his three IRS members. Once you have defeated the God Onion boss you will have completed the game 100%.