I'll dress up as Monkey King.

我要装扮成猴王。

Fox: Monkey King, how are you today?

狐狸：猴子国王，你今天还好吗？

What about Monkey King?

美猴王怎么样？

I'm the Monkey King!

我是美猴王！

He dresses up as Monkey King in the film.

在这部影片中他装扮成美猴王的模样。