Here's how the encounter works:
* He's disguised as Alastor Moody: He's pretending to be the Defense Against the Dark Arts teacher, so you'll face him in that guise.
* He's a boss fight: You'll need to use your magical skills to defeat him, not collect him as a playable character.
* He's a tricky opponent: Be prepared to use your spells and potions wisely, as he's a powerful enemy.
While you can't play as Barty Crouch Jr., his presence in the game adds to the storyline and provides a fun challenge.