found the clown, the EX enemy area with GOD, and the "Narrator" enemy, were they all?
The Clown and Hall of Heroes (GOD) were not really secrets, The Narrator definitely is, but there are 2 more, both in town, one of which is incredibly obscure. (SAVE BEFORE DOING THAT ONE, THERE'S NO GOING BACK)
I can tell you hints, you'll probably need them lol.
The obscure one is REALLY HARD