Year 2, Chapter 6
Head to the open cubicle then use WiLe to clear the pet tunnel. Continue to the left then shoot the painting to clear the entrance. Send Ron's pet to the tunnel then continue east and press the switch. Switch to another character then use LuSo to kill the vine. This will open the cubicle and rescue the student in peril.
Use WiLe to fit the elbow tubing on the pet tunnel. Do the same thing to the other cubicle, then order Ron's pet to press the switch. Head left then use WiLe on the small cabinet. Assemble a large plumber out of the lego pieces, then ride it. Steer it towards the clogged toilet and more pieces will appear.
Assemble the pieces then using Harry, talk with the snake glyph to proceed further.
After landing, look for the bones that you can assemble. Assembling 4 of these will reveal the Red Crest piece. Three of them are in the ground level while the other is located in the upper level. Head left and approach the tunnel for the squid to appear. Use the nearby plumber to plug its mouth. Once it goes away, build a platform from the pieces it left and step on it as an ally lifts you. Follow the path to reach the last skeleton.
Rebuild it so another squid appears. Cross the gap with the help of the water fountain, then rebuild the pieces on the other side. There are also four dig spots in this area; (you need to come back for this later during free play) dig them all to get a Yellow Crest piece. Cross the bridge, then use WiLe on the snake statue. Jump to its mouth then enter the tunnel for the last part of this chapter.
At the start of the battle, avoid its beam glare as it will cause instant death to your character. You need to find the ingredients first to create the strength potion. There's a piece behind each pile of boulders. Just run around and lure it to the boulders until they're destroyed. You still need to interact with the object behind the boulders before you can get the part. For the snake glyph, just press B to communicate with it, for the bottle piece, just destroy the charmed snake and finally for the bone piece, retract the vines then open the chest. Assemble the skeleton and grab the piece.
Drink the strength potion and go up the ramp to the left. Pull the chain to open the metal gate. Watch the following scene. Use your targeting skill to hit the basilisk's head. Once it dives underwater, search for three piles of lego pieces which you can assemble into various musical instruments. Assemble all of them to get the Green Crest piece. Head to the ramp again then use WiLe to attach the chains and pulling them down. Fall through the large pipe to get near the basilik. Use WiLe on the wizard hat to change it to a weapon, then use the weapon itself kill it.
Gilderoy Lockhart – After jumping down from the bathroom and reaching the underground area with lots of bones, head to the far left to find two dark chests bound by vines. Free them then shoot them with dark arts.
Wizard (Green) – Beside the dark chest of Gilderoy.
Tom Riddle – After opening the gate to the left by pulling the chain (after completing and drinking the strength potion), the phoenix will arrive and attack the basilisk. While the basilisk is struggling, send a key character to open the safe to the far right.
Blue Crest piece – Shoot the lock on the circular hatch using RE then assemble the pieces to a clock. It is located before the ramp to the left.