Are there any trolling plugins?

For my all the mods 3 server

Could you explain what you mean by “trolling”? Do you mean under the bridge kind of troll? Or joke kind of troll? If the latter what kind of joke?

Just a funny visual prank you can do to you friends, like spawning in a harmless creeper

Im not aware of any that spawn a harmless creeper in, but there is Nucleus with /KittyCannon (sends out a exploding kitten)

There is also Entity disguise, a old plugin that allows you to disguise as many mobs including a creeper