April Derp is a corrupted version of April O' Neil.
She first appeared in The Kraang Conspiracy. She was a failed clone of April made by The Kraang. She attacked the turtles but was soon killed. She was last seen exploding into a pile of goo.
- On April Derp's left eye, there is a tiny head that looks like the real April O'Neil.
- Her left leg and right arm are horribly deformed.
- She is a clone of April.
- She has a tongue on her back.
- She might be re-made later on the series.
- Her skin is totally palid but in the promo image she has a normal color of skin.