The Horn Beetle-It has a few attacks. The first is to charge at you, as it’s doing so it will lift off the ground, burst dash underneath it. Then hit the orange spot on its behind. The second is a fire spread along the ground, jump and burst over it. The third is jumping in the air, just walk under it and get attacks in. It repeats these attacks over a few minutes. Visual guide below at time stamp 1:03:24.