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human
[Harry Potter] Did Barty Crouch Jr teach (almost) a full academic year at Hogwarts?

In book 4, is Mad Eye Moody locked up in that trunk for the whole year? Or did Barty Crouch Jr just show up as Mad Eye for certain things (like helping Harry with Triwizard stuff)?
gpt
Mad Eye Moody is locked in the trunk for the entirety of term. Barty Crouch Jr. is the person everyone interacts with for the entirety of term. Crouch, with magical aid, is just that good at playing the role.