Tom Riddle's Diary (2-4) - LEGO Harry Potter: Years 1-4
Year 2, Chapter 4
You'll start the chapter with a fight against Moaning Myrtle. She'll throw debris at you so you need to hurl them back to her using WiLe. This will open the cubicle doors. Once the last cubicle door opens, shoot her to damage her. Repeat this two more times. She'll get stuck after taking her third hit so quickly shoot again to defeat her.
Moaning Myrtle battle
You'll find yourself in a flashback stage. You need to look for ingredients for a potion again so start by blasting the knight armor and the bookshelf to get the first piece. Shoot all six armors in this room to reveal the Red Crest piece. Four are located at ground level while the other two are located in the upper platform. Place it to the cauldron to the right, then step on the piston-like mechanisms to create foothholds on the wall up front. Hop to the upper left, then blast the knight armor again and the pot to get the second piece.
Next, go back again to the pistons and use the footholds again to jump to the upper right. Hit the piston there and jump across the gap to the right to find a shaking brick. Shoot it to destroy it to get the final piece.
After throwing the last ingredient in the cauldron, retract the vine in the middle then use WiLe to repair the closet. Go inside to equip some earmuffs then use the mandrake to shatter the glass cabinet beside the closet and other glasswares in the room if you want to. Drink the strength potion then pull the chain to reveal some lego bricks. Use the bricks here to create a walkway on top of the pink arcs so you can reach the other chain to get out of this area. You don't have to use all the bricks.
Head to the right and kill the pixies holding two more lego bricks. Assemble them on top of the arcs so you can jump through. Remember that you must reach the next chain before the effect of the potion wears off. Pull the chain to remove the obstacle.
In the next area, you'll need to find and shoot all three radios scattered to unlock the Green Crest piece. Follow the path until you reach the first stairs. Jump on the piston to the side then shoot the first radio.
Cross the stairs, then shoot the painting. Use the part the painting threw away to fix the second piston. Step on it to fix the stairs, then shoot the second radio. Place one of your characters beside the bookshelf, then use WiLe on the table to rotate the bookshelf. Switch to the other character and do the same thing to regroup.
Shoot the banner to reveal some pieces. Use WiLe to create a trampoline. Jump to the next platform, then use LuSo to retract the vines and release the footholds. Jump down and place the footholds on the wall so you can jump to the upper part.
Shoot the last radio here to unlock the Green Crest Piece. Finally, arrange the arcs on the side to complete the chapter.
Moaning Myrtle – During the boss battle with her, head to the far right of the bathroom then open the dark cabinet to get her token.
Yellow Crest piece – Shoot the silver chest in the upper left corner of the room. Ride the plunger around the room to remove all 5 water puddles. The crest will appear after removing the fifth puddle.
On the first flashback room, head to the far right and have Hermione solve the puzzle cabinet. Grab the key, then use it to open the locked cabinet to the left. This will save the student in peril inside.
Vocalist - At the start of the second area, open the safe behind to get this character token.
Blue Crest piece - In the same hallway as the safe containing the Vocalist token, continue south and use RE to unlock the chest in the corner.
Professor Vector – In the last area before arranging the the pillars to exit, you'll find the safe beside the third radio.
Follow the trail of spiders then exit to the next area. Just keep following the path of spiders until you reach Hagrid's cottage.