If you ask how to make nightcore, I use this website. It kind of makes it sound like it was recorded though. twistedwave.com/online/ 
I don't own this song.

Nightcore - Copycat - Billie Eilish

---Feel free to request any song you want speed up or slowed---
♡Instagram: anm_nikks♡
♡Anime♡
♡Lol switching my stuff from nightcore to anti-nightcore (slowed)♡
♡Credit to all the artist who drew all the photos you see on my account♡
♡I don't own any art or songs that I post (I just edit them)♡

Nightcore - Copycat - Billie Eilish

Nikks ♡