Harry’s Troll Problem Part 1
Introduction
Hello everyone, welcome to Part 1 of our Walkthrough for Harry’s Troll Problem Adventure of Harry Potter Hogwarts Mystery. This adventure is available for witches and wizards who reached Beyond Hogwarts Volume 1 Chapter 6, and once you unlock it, you have one day and nineteen hours to complete this adventure. In Hogwarts, a mountain troll has been captured in the girls’ bathroom, and Harry Potter, Hermione Granger, and Ron Weasley are involved. The ROCC team faces the challenge of removing the troll, and you’ve been assigned this case, which poses quite a difficult task.
Summary
Part 1 Summary:
- Task 1: Meet with Flump
- Location: ROCC Division
- Requirements: 8 hours – 3/5 stars
- Choice 1: Reply to Flump
- That’s an outrageous request: +5 Courage
- Not a problem: +5 Knowledge
- Choice 2: Tell Flump why you’re the best for the case
- I know Hogwarts: +5 Empathy
- I have troll experience: +5 Courage
- I’m your best agent (61 Knowledge): +10 Knowledge
- Task 2: Go to Hogwarts
- Location: West Towers Corridor
- Requirements: 3 hours – 5/5 stars
- Choice: Reply to Snape
- It’s my job to clean up messes: +5 Knowledge
- I’m more than a janitor: +5 Courage
- Task 3: Learn Mobilicorpus
- Location: Destroyed Girls’ Bathroom
- Requirements: 8 hours – 5/5 stars
- Choice 1: Tell Professor Flitwick what you think about Mr. Potter and his friends
- They’re lucky: +5 Empathy
- They’re skilled: +5 Knowledge
- Choice 2: Tell Professor Flitwick what you think is the most discreet way to the mountains
- Hogsmeade: +10 Courage
- Forbidden Forest: +5 Knowledge
- Knockturn Alley: +5 Empathy
- Task 4: Escort the Troll
- Location: Forest Grove
- Requirements: 8 hours – 5/5 stars
- Choice: Choose to Accept Callum’s help or push him back
- Push back: +5 Courage
- Accept the help: +5 Empathy
- Task 5: Meet with Dumbledore
- Location: Dumbledore’s Office
- Requirements: 8 hours – 5/5 stars
- Choice 1: Tell Professor Dumbledore if you had any trouble with the troll
- No trouble at all: +5 Empathy
- I had some trouble: +5 Courage
- Choice 2: Reply to Dumbledore
- There was a troll during my fifth year: +5 Courage
- Yes, definitely after Hogwarts: +5 Knowledge
- Part 1 Rewards: 2 Gems, 2 Chocolate frogs, 500 Experience Points; Troll figure will be added to your inventory
Walkthrough
Video guides are available at our YouTube channel. Use the button below.
Proceed to the ROCC Division when you are ready. Upon arriving, you’ll notice the speech bubbles above some characters. Tap on those if you’re curious to see what they have to say. When you arrive, you’ll approach Flump.

He’ll say there’s something really important and he needs your help because it’s related to a place you know well.

After that, he’ll ask you to pay close attention to what he has to say. To complete the next task, you need to earn five stars within eight hours. Three stars are required to pass.

Bonus progress actions are tied to the ROCC agent to your left, Flump, and Olivia. Prioritize these actions to save some energy.

After the conversation, you’ll discover that there’s a mountain troll on the loose at Hogwarts. You’ll wonder if it’s maybe a Halloween prank gone wrong. Flump will tell you that there isn’t much information available, but he’s been instructed to get rid of the troll as soon as possible. He’ll also mention that three students were part of the situation and they managed to stop the troll before it could cause any harm.

He’ll respond by stating that the troll is currently in the girls’ bathroom, he’ll also mention that the faculty is eager to remove it from the school grounds. Additionally, he will explain that this situation has been entrusted to the ROCC, as it requires a discreet approach.

You’ll let him know that you understand it and ask if he wants you to get rid of the troll. He’ll say that you should not only get rid of the troll but do it quietly and secretly. You can reply in two ways. These options will influence some dialogue that will follow, but they won’t impact the story.

Shortly afterward, he’ll mention that he usually assigns these cases to experienced ROCC agents, but this time your name was suggested. You’ll be curious about who recommended you to Flump for this task.

Your boss will then ask why you are the most suitable agent for that job. There are three different options to choose from. All of them will eventually lead to the same outcome, so feel free to take your pick.

Then, you’ll ask him whether you have been assigned this case.

This line will differ based on your previous choice.

He’ll also mention that you will meet with Headmaster Dumbledore to get more information, and he’ll warn you to remove the troll before anyone else becomes aware of the situation.

Go to the Corridor at Hogwarts to continue the story. Upon arriving, you’ll notice the speech bubbles above your former professors. Tap on those if you’re curious to see what they have to say. When you get to Hogwarts, your old professors will be excited to see you.

The Headmaster will remark that it would be better to meet you in different circumstances. After greeting the professors, you’ll inform them that Magical Maintenance has sent you to assist. He will then go on to explain in more detail what happened.


You’ll ask him who those students are.

You’ll respond by expressing that you’re not surprised Weasley was involved, and you’ll mention that Bill and Charlie used to get into mischief with you as well.

Professor Dumbledore will then say that you must remove an incapacitated mountain troll from the bathroom quickly.

Professor Snape will ask why the janitor was sent to them for such an important task. You can reply in two ways. These options will influence some dialogue that will follow, but they won’t impact the story.

After that, Dumbledore will say it’s very important to act quickly and make sure you move the troll away from Hogwarts without anyone noticing. The professors will then want to know what your plan is. To formulate the plan for a troll moving, you need to earn five stars within three hours. All five stars are required to pass. Since this task requires a lot of energy, it is recommended to start it with a full energy bar.

Bonus progress actions are tied to the Headmaster, Professor McGonagall, and your character. Prioritize these actions to save some energy.

After that, you will suggest that you need a spell to raise the troll. You will mention something like the Mobiliarbus, which is intended for trees. The professor will then praise your idea and inform you that there is indeed a charm suitable for this situation.

These lines will differ based on whether you know the Mobilicorpus spell or not.


Shortly after, the Headmaster will mention that he’ll send Professor Flitwick to meet you in the girls’ bathroom. There, she will teach you Mobilicorpus. You’ll thank them and head towards the sleeping troll. Proceed to the Destroyed Girls’ Bathroom when you are ready. When you arrive, you’ll find a really bad situation, which is a bathroom that’s been wrecked and a troll right in the middle of it.

Soon after, you will be greeted by Professor Flitwick, who is already there waiting for you. This line will differ based on whether you visited Hogwarts after graduation or not.

Following that, you’ll remark on the destruction caused by the troll and mention how fortunate it is that nobody got hurt. The professor will respond by saying that Mr. Weasley, Miss Granger, and Harry Potter are either very skilled or perhaps very lucky. There are two different options to choose from. Both of them will eventually lead to the same outcome, so feel free to take your pick.

Shortly after, Professor Flitwick will mention that you’ll need the right skills to deal with that mountain troll. You’ll agree and specify that you require a particular charm. He’ll respond that Professor Dumbledore informed him about your plan to use the Mobilicorpus charm. These lines will differ based on whether you know the Mobilicorpus spell or not.

Professor Flitwick will get you ready for the Mobilicorpus spell and advise you to be careful not to cast it incorrectly to avoid waking the troll. To complete the next task, you need to earn five stars within eight hours. All five stars are required to pass. Since this task requires a lot of energy, it is recommended to start it with a full energy bar.

Bonus progress actions are tied to the troll and your character. Prioritize these actions to save some energy.

After that, you’ll inform the professor that you’re ready to cast the Mobilicorpus before anyone notices, and he’ll wish you luck. Trace the wand movement to cast Mobiliscorpus.

You’ll effectively cast the spell, and the troll will start to float in the air.

Professor Flitwick will praise your success and let the Headmaster know to keep the hallways clear. He’ll stress the importance of finding a safe place for the troll once you leave Hogwarts. You’ll suggest the mountains as the logical option since it’s a mountain troll.
You’ll also mention that you should take it through a low-traffic area to reach the mountains. After that, Professor Flitwick will ask your opinion on the best and most secret way to reach the mountains. There are three options to choose from. The correct option is the Forbidden Forest.

The professor will praise your clever strategy and urge you to be cautious, highlighting that you definitely don’t want to wake up a grumpy mountain troll.

Go to the Forest Grove at the Forbidden Forest to continue the story. Upon arrival, you’ll be surprised to find Callum, and you’ll ask him why he’s there. He’ll explain that Flump instructed him to come and check if you completed the task correctly. There are two options to choose from. If you like Callum, it is recommended to pick the second option.

He’ll say he’s not sure if you really need help but that it’s a significant case, and Flump is likely being cautious. He’ll also compliment your idea of using Mobilicorpus. You’ll tell him that you haven’t faced any problems since leaving Hogwarts, but you’ll admit that dealing with the troll feels awkward.

You’ll ask him why he thinks that, but then you will hear some noises and quickly turn around, and then you will see the troll starting to wake up.

After some time, the troll will completely awaken.

Callum will alert you, saying that mountain trolls can be very harmful. This line will differ based on your previous choice.

Callum will say that you have to stop the troll before it runs away.

To duel the troll, you need to earn five stars within eight hours. All five stars are required to pass. Since this task requires a lot of energy, it is recommended to start it with a full energy bar.

Bonus progress actions are tied to Callum and your character. Prioritize these actions to save some energy.

After a tough encounter with the troll, you’ll manage to defeat him, and he’ll retreat and eventually run back into the mountains.


Callum will say that he thinks after the beating you gave the troll, it won’t be causing any trouble for a while.

This line will differ based on your choice in the first task.

He’ll mention that he was right in recommending you for the job, and you’ll be glad to know that he proposed you for this task to Flump.

He’ll mention that he’ll inform your boss that you did an excellent job, and you will thank him.

Proceed to Dumbledore’s office when you are ready. When you arrive, you’ll approach Dumbledore and tell him you have an update on the Mountain Troll.

You’ll comfort him, assuring him that there’s no need to worry. You’ll explain that you’ve successfully led the troll out of Hogwarts, and it’s heading back to the mountains. You’ll further mention that Hogwarts is now secure. He will then ask if there were any issues with the troll. There are two options to choose from. (If you selected the second option and have experience fighting trolls in past adventures, you’ll have more lines of dialogue and an extra choice.)

Afterward, you’ll comment on how things have changed since you left Hogwarts. Professor Dumbledore will agree and mention that not all the changes have been for the better. You’ll ask him to explain what he means and share what’s going on.


To learn about Dumbledore’s concerns, you need to earn five stars within eight hours. All five stars are required to pass. Since this task requires a lot of energy, it is recommended to start it with a full energy bar.

Bonus progress actions are tied to Professor Dumbledore and your character. Prioritize these actions to save some energy.

You’ll learn that Harry Potter’s being at Hogwarts has caused a lot of excitement and attention.

The Headmaster will admit that and mention that he is worried, so he’s implemented additional safety measures.

You’ll have questions about the item, but he’ll assert that he’s given you all the necessary information. He’ll also mention that you shouldn’t be taken aback if he reaches out to you in the near future for more assistance.


Professor Dumbledore will thank you for your help.


This will mark the end of Harry’s Troll Problem Mini Adventure. Hit the Collect button to claim your reward. You will receive 2 Gems, 2 Chocolate frogs, and 500 Experience Points. You’ll earn the achievement for completing the adventure.

You’ll also get a bonus reward, which is a troll figure in your inventory that you can place anywhere in your apartment.

Our short but interesting adventure has come to an end. We safely escorted the troll out of Hogwarts, even though it woke up briefly, but we defeated it. We’ve also learned that strange things are happening at Hogwarts due to Harry Potter’s presence, which worries Professor Dumbledore. What is Professor Dumbledore keeping a secret? Is it related to Harry Potter and his friends? What’s next? Stay tuned to find out!
Thank you for reading.
