Want this question answered?
You have to sniff the boomslang skin to get out of the room of requirement on Lego Harry Potter.
Talk to the portrait on the south side of the room.
Snape's classroom is the potions room near Professor McGonnagle's classroom.
There aren't any characters in the library because you can't access this room.
You have to look around the potion room to find the ingredients.
You go to character shop and you walk into the dressing room on the left.
on playstation three, she is in the slytherien common room above the water fall
In the room where Hagrid is it's at the end of the level Tom Riddles Diary.
Talk to the portrait on the south side of the room.
The room of requirement only is available from year 5 onwards and it's only possible to enter on one of the levels.
There is one, but it is a Lego building game. You can create characters, move around Hogwarts, fly, etc. but it is not based around the book. You can access the dungeons and common room.
Hagrid can be unlocked in Lego Harry Potter Years 5-7 by completing all of the levels that take place in the forbidden forest.