NOTE: You need the pixil Flip to do this!

Once you have done that go to any world that you have unlocked and find an enemy And then get out Flip MAKE SURE THAT YOU ONLY HAVE 1 HP! Then use Flip's ability and go right next to an enemy while using Flip's ability Then when they are EXACTLY right next to you change into any pixil then when you switch the enemy will hit you and you will have 0 HP! But then the next time that you get hit by an enemy you die