Haw do you get voldemort.?

On the final level voldemort is behind the snake nagini

If you mean the character coin thing to get it in Harry vs voldemort when you get to the part when you defeat nagini or something when you Allready pushed the statue to the other side there's another statue cast a spell at it take the shield give it to the other statue use a spell to turn it around and then destroy it

I think you have too have a dark magic character(like Peter pettigrew) and in free play

Hope this helps

On the last level when you playing as ron after everytime harry comes to fight you will see a gap in the wall near where voldemort was, go in their then to the right and you will have him but you will need a lot of studs!

When you are fighting nigini the snake go behind it and the are little nooks in the wall. Go to the one right behind it and you will get it[spoiler]

If you to Madam Malkin's, which is right next to the Leakey Cauldron right as you get inside there is a character board. But you should save up your money cause it's 25 million stubs!!!!!!!!!!

I am pretty sure you have to be in free play to get his token. I do not know if you have to use a certain character or not (I uses tom riddle) but when you are battling Nagini with Neville go to where the statue that you used to deflect Voldemort's spell with and you should be able to destroy it and Voldemort's token should be there. This is for the mobile app. Note that Voldemort will only cost 1 million. Hope this helped!! ^_^