Andrew Stein (otherwise known as MandoPony) is an American musician formerly signed to the nerdcore-themed record label Give Heart Records. He is known for making songs about video game franchises like Five Nights at Freddy’s (FNaF) and UNDERTALE. His latest album, Smoke & Mirrors, was released in early 2018.

In late 2018, Stein was a supporting act for NateWantsToBattle on the Paid in Exposure Tour, alongside Zach Callison and AmaLee.

Following allegations in 2020 about Stein inappropriately acting towards minors and cheating on his wife, the number of songs he created in the following years slowed. He eventually released a statement two years later addressing these allegations, but the nerdcore community remains split on Stein’s innocence.