Walkthrough
Since the bridge to Lake Cappucci is broken, you will have to Find an alternate path in order to prove John Waals' innocence. After talking with the various people on the Island, you will learn that there is a Secret path to the lake located somewhere on the island. If you continue to investigate, you will learn that there use to be scrolls given to the children of the island long ago in order for them to find the secret path to the lake. Going off of one hint you will receive, you will be able to obtain one of these scrolls from the old man that lives in the House next door to John Waals.
After receiving the scroll, you will need to Find the entrance to the Secret path. The old man you received the scroll from will inform you that the secret path begins with the scales, not being able to explain where you can find said scales. However, by examining the broken rocks to the right of Waal's House, you will see two scales engraved in one of the stones. This is the beginning to the secret path, the same Milo will ask to travel with you after you discover it.
Once you enter the Secret path, you will examine the scroll you received. There will be a lot of information found on the scroll, but the only thing you will really need are the colors that are shown. To Find the first path, you will need to Match the statue to the color green. Since Tropius is covered in green leaves across its body, you will need to take its corresponding path. After taking this path, you will have to make it through the path full of Stunfisk with Pikachu, which just so happens is your next Fast Action Event.
After making your way through the Stunfisk, you will arrive to the next set of statues. Unfortunately, the colors of these statues have faded. In order to Find the correct path, you will need to find the Pokemon that is originally blue. Out of all the Pokemon shown in the form of statues, Ducklett is the only one that is the color blue. Take the path connected to the Ducklett Statue to arrive to the third and final area before the lake.
When you reach the third area, you will need to Find the statue of the Pokemon that is pink, like shown on the scroll. Unfortunately, none of the Pokemon are pink. You might think this is a mistake at first, but after doing some investigating, you will discover that Shellos can be found in one of two different forms, one of which is the color pink. By following the path near the Shellos Statue, you will finally arrive at Lake Cappucci.
After you reach Lake Cappucci, you will suddenly have a few Poliwag thrown at you. After doing more investigating and chatting with the Pokemon found at the lake, you will quickly discover that the Masquerain are the ones causing the fog. Apparently, they have created it because they were concerned about the outsiders that have come to the lake recently, the same that have started causing trouble with other Pokemon. Fortunately, they will clear the fog after you have the friendly Feebas, who you met earlier along the Secret path, talk with them.
Once the fog has been lifted, you will need to further investigate the lake to learn about these outsiders. Before long, you should Find that a Crawdaunt, not local to the lake, is the one causing all the trouble. By continuing your search, you will actually learn that Crawdaunt was brought to the lake in a box by someone. By returning to Brad after learning this, you will explain to him that Waals wasn't the one behind the fog at the lake. Being how stubborn he is, however, Brad will mention that Waals could've been the one that brought the Crawdaunt in the first place. And because of this, you will further have to prove Waals' innocence.
Scroll
Monument In Town
Broken Monument
Statue of Tropius
Broken Statue
Statue of Stunfisk
Statue of Timburr
Statue of Wingull
Statue of Ducklett
Statue of Shellos
Statue of Grotle
Statue of Azumarill
Broken Fishing Rod
Claw Marks On The Trees
Piece of Wood
Wooden Box Fragment
Broken Bottle
Which Path Does The Scroll Show: Investigate the statues at the beginning of the Secret path, consulting the map to Find the correct first path!
Which Is The Second Path: Investigate the second set of statues along the Secret path to Find the correct second path!
Which Is The Third Path: Investigate the third set of statues along the Secret path to Find the correct path to the lake!
What Is The Truth of The Fog Situation: Investigate the lake and consult with the Pokemon nearby to discover the truth behind the fog!
Watch Out For Stunfisk's Electric Shocks: Press the A Button to dodge Stunfisk's attacks.