Battle Royale III: Frenemy mine.

[deuterio12]

pass through Doomsday's skin to hit his brain).

Altough I'm rooting for Negima here, I must point out it's been stated that Doomsday has long evolved over having soft squishy vitual tissues of any kind. There's even a comic where supes uses a high-tech laser sword to almost cut doomsday in half, and we can see it has no internal organs or blood whatsoever inside, just compact grey mass that quickly glues itself back togheter. He's more of a flesh golem than a monstruous humanoid.