To go to the Bean Bonus Room you must be able to go into ghost mode !

Play Ron's challenge until you get to the chamber where the final shield stands. Don't grab the shield yet. Go into ghost mode instead & go thru the left wall. Down on the left you'll see the Bean room. Go there & exit ghost mode to collect every bean without any timer rushing you ! Go back into ghost mode to return to return to the last shield. Exit ghost mode to get that shield. The game will then send you back to the Bean Bonus Room with the timer going but there will be no beans. What I do then, is go into ghost mode and head toward where the last shield was BUT just beyond that area and a little left of it is the "side chamber" for that challenge. You can go there and exit ghost mode only when you are facing the 2 sets of armor that are on either side of the Draconifors door. Hit the armors 5 times each to get 50 beans. If you're fast, you'll have a tiny bit of time to then turn about face from the armors & run toward the 3rd set of armor...this will allow you to skip the upcoming cut-scene & it thrusts you to the next part of the game.

Play as Hermione until you get to the maze room area where the last shield stands atop a high pillar. After you're done with the Draconifors dragon, don't grab the last shield yet. Go into ghost mode & exit the maze area thru the wall where the dragon is standing. The Bean room is in the distance, on the right...but BE CAREFUL not to go thru any black square areas as you exit. These areas can mess up your game. Always go out straight & after you're past the black squared off area, cut over to the right. When you're in the Bean room, exit ghost mode to get all the goodies. Go back into ghost mode & return to the maze room. Exit ghost mode to get the final shield. As in Ron's challenge, you'll be sent to the Bean room but all the goodies are gone and the timer is ticking away...so I immediately go into ghost mode & head toward the maze room...but past the maze room, in the distance, is the "side chamber'" for this challenge. Repeat what you did as Ron, and you'll be thrust into the next part of the game.

As Harry, play thru Glacius only half way thru the challenge. When your computer goes to the "Loading Game " screen you will enter the second half of the challenge. When you first see Harry, he is standing in a reddish room area where, if you go forward, 3 pixies will come out of a dark window on your left. You don't have to fight them...