This thread is just like Battle of the Bands or Battle of the Brands, except with creatures.
Basically all you do is you vote for an animal that would beat the other.
Today we will solve one of movies greatest mysteries:
Lions
Enderman look dumb and besides they don't have in Minecraft pocket edition. However, Slender is very creepy and some people are legitimately afraid that I know...
Comparing Slenderman to a Minecraft monster? You might as well put Freddy Krueger against a Goomba.
Of course Slenderman wins. He's a real villain. Not "real" in the sense that he isn't fictional, but you get the idea. He has depth, as well as a story behind his character that people of certain age groups actually believe.
The only real similarity between these two that I see is that their names rhyme, but by that logic, you can just as easily battle Jeff the Killer against Wentworth Miller.
There is no way Sushi Cat could lose a battle with the Blue Elephant. The best that Blue could do would be to defecate large amounts of pastries in the hopes that it would put him on Sushi Cat's good side, but even then, Sushi Cat could just roll over him or gobble him up in one bite.
The projectiles of the peashooter must be quite hard, after all it uses it effectively against zombies. I assume those peas are quite heavily lignified.
But that just means that the octorok and the peashooter might be on equal terrain concerning the nature of the projectile. The octorok has a more substantial advantage than just shooting rocks: it seems to be mobile, while the peashooter is certainly sessile. This gives the upper hand to the octorok.