yes you need the spell 'Reducto' and he is in a locked treasure chest in the bank from the level 'the magic begins'.
You can't. The acromantula isn't an unlockable character, just an enemy.
No. There is no unlock everything code. Lego Harry Potter has codes only to unlock Red Boxes.
You will need to acquire a dark magic character. The easiest one is located in the Chamber of Secrets, in the vault on the right hand side. You will need Griphook with the keys to open it.
Many of the characters have more than one appearance, e.g. 'Ravenclaw Boy/Girl/Prefect', and the character icons scroll through the different versions. They appear to be blinking until you unlock all the variations.
you have to unlock it
Once you finish a mission you will unlock freeplay. Choose freeplay and your character will be at the bottom-right of the screen. Also, their heads appear but are darkened in.
The character in the Hufflepuff dorm that you can unlock is the 'Hufflepuff Girl'.
You don't unlock the New Goblin. You just do the game and later on you'll fight him.
Only on the Collector's Edition, you beat the New Goblin, and you will unlock him.
You get enough money to buy it that's how you unlock it.
You can't. The acromantula isn't an unlockable character, just an enemy.
You can get the spells by using the character detector from Diagon Alley after you unlock it as a red brick.
I beat-ed the game and didn't unlock venom and you can unlock new goblin
Go onto free play,try and make sure you have a ghost,goblin and a strong person .They can unlock thing's that story play characters can't.
Lily and James will be unlocked when you go through the Dementor's Kiss level after unlocking a Dark Magic character and becoming them in the Free Play mode.
You have to finish all the levels then you have freeplay mode
No. There is no unlock everything code. Lego Harry Potter has codes only to unlock Red Boxes.