Character special abilities
Each character (Harry, Ron, and Hermione) has a special ability. Use Ron to find hidden passages. Use Harry to jump long gaps. Use Hermione to crawl under small spaces. This is useful when getting spellbooks or escaping Trolls and Prefects. The best player to use is Hermione. When you learn spells with her, it is much easier than with Harry. It is easier to cast spells as well. Harry is not as good at spells, but is much faster when walking and has more stamina. Ron is not really good for anything.
Getting Chizpurfels for Snape's Class
You cannot just run over to Chizpurfels and pick them. You must do something to them so that they are safe to pick up. When you speak to Hagrid, he tells you to lure the Chizpurfels that are under the trees on the right-hand side into the lake by the Venomus Tentacula (after speaking to him after awhile). Hermione then says, "Come on we've got to find Buckbeak". However, you do not need Buckbeak at all. As Ron, run over to the Chizpurfels and equip Lumos on your spells. There are two Venomous Tentaculas. One is awake, and one is asleep. Lure the Chizpufels one by one in front of the Venomous Tentacula that is awake. The Venomus Tentacula will chew the Chizpurfels and spit them back out. They will now be safe to pick up.
Getting Doxey eggs for Potions class
Have plenty of Antidote because Doxeys are poisonous. Use Flapindo to get rid of the Doxeys, then have Harry use the spell that grabs things, Carpe Retractum, to pull the eggs towards you. Hold the Analog-stick Toward you to pull them.
Getting Fairy Wings
Have Hermione repair the dragon statue with Reparo. Then, shoot Draconifors at it to light the bush in which the fairies are hiding in. The fairies will get mad and attack you. Then, have Hermione shoot them with Flipendo then use Glacius on them while they are on the ground.
Getting Fireseeds for Potions class
To get Fireseeds, go outside then go to the right. Keep going until you see the greenhouses. There is a tree here. Have Hermione go up to the tree and use the Glacious spell. When the fire is gone, Fireseeds will appear.
Getting the non-jinxed Qudditch crate for Harry
Fly in through the top with Buckbeak, using Hermione as the rider. Dismount when inside the courtyard and find a puddle of water. Use Glacious to freeze the puddle and it will turn into an ice block. Have Hermione climb the ice block and set the dragon statue on fire with Draconifors. The dragon will light up and blow fire. The fire will burn the rope that the crate is hanging from, and it will fall. Because you only have a limited time to go to the Quidditch field, just fly Buckbeak as fast as possible. The field will be where there is a tower with four colored flags. Once you see them, land on the green next to the tower to complete the task.
Easy beans
You can get lots of beans and Wiggenweild Potions in Fred and George's bathroom. Play as Ron and go to the back room. Go up to the robes and press A for both sides. Beans and sometimes Wiggenweild Potions will appear. Go through the secret wall, then go back to Fred and George's. Go to the robes and do the same thing. Keep going back and forth and you will have plenty of beans.
When using Harry, Hermione, or Ron, fire your attacking spell at a bush. A bean will appear. Continue to do this as many times as desired.
When playing as Ron, go up to a bookcase and search it. You will either find a bean, stink pellet, or Wiggenweld Potion. This only works while playing as Ron.
The Charms classroom has probably the most beans in it. If you walk to the back of the classroom, there is an obvious chest. However, if you go into the back left-hand corner, you will notice a bookshelf. Beside the bookshelf is a broken box that can be repaired with Reparo and can be climbed upon to reach the shelf and the chest, which has many beans in it. However, there is yet one more set of beans. Go to the right side of the classroom and climb up into the desk areas. There is a bookshelf. To the left of the shelf is an object that can be pulled down using Carpus Retractum. This opens the bookshelf beside you. Inside is another chest with many beans and two flying books.
Hidden Collector Cards
Using Hermione, go to every fireplace around the school, including the Gryffindor common room fireplace, and use the Glacius spell on them. By doing this, a Famous Witches or Wizards card will appear. Also using Hermione, purchase the Snufflifores Spellbook at Fred and George's shop for 50 Beans. Using this spell, you can turn flying books into mice, which will run away into a mouse hole located within that room. When the mouse enters the hole, either a rare card or Bertie Bott's Beans will appear.
Go to Fred and George's bathroom on the Sixth Floor. Use Hermione and go to the second cubicle on the left as you enter. The toilet will be leaking, and a puddle will have formed on the floor. Use Glacius on it to for an ice block, and a rare card will appear.
Go to Fred and George's bathroom on the Sixth Floor. As Hermione, walk to the first cubicle on the right hand side. You will see that the toilet is smashed and laying in pieces. Use Reparo to will fix it, and a card will appear.
Go through the secret wall at the back of Fred and George's bathroom where you got the marauder's map. Look to the left. Have Ron and Harry lift up the grill and Hermione crawl under and flip the switch. A bridge will extend across from you to the platform which housed the map, and which now has a caged card in the middle. Go across as Hermione and use Glacius on the fire balls. Look at the floor to see that there are three buttons. Choose one character for each of these and, as Harry, use Carpe Retractum on the card in the middle.
When in the marauders map area, you may notice that you cannot get to the gold tower in the middle of the room (the tower with the marauders map at the top), unless you use Hedwig to fly to the top of the tower. When Harry has Carpe Retractum, go to the gold tower room. Use Harry and Ron to lift the iron gate, and have Hermoine to crawl under it and press the switch. When you press the switch, you can go to the gold tower. You will see a Collector Card on a thing in the middle of the tower. Use Carpe Retractum to get the card.
Collector Card set bonuses
Successfully complete the following sets of cards to unlock the corresponding bonus:
Beasts: 20 House Points.
Classical Beasts: Ron gets extra endurance.
Dragons: Ron gets extra endurance.
Giants: 20 House Points.
Goblins: 20 House Points.
Hags: Hermione gets extra endurance.
Quidditch: Harry gets extra endurance.
Vampires: 20 House Points.
Witches: Hermione gets extra endurance.
Wizards: Harry gets extra endurance.