Park revealed the third mission: 'JYP vs. YG', similar to the agencies' trainees' showdown happened in 2013 reality television program Win: Who is Next. A week before the battle, the group picked their representatives for vocal, dance and free battle teams. For the vocal team, they needed to perform a song from the girl groups of the other agency. Chan, Woo-jin, Ji-sung, and Jeong-in selected Black Pink's 'As If It's Your Last'. They worked on a remix version of the song to fit Stray Kids' concept. 3Racha prepared a rap performance titled 'Matryoshka', about Russia's traditional dolls. On the battle day, they went to YG Entertainment headquarter where they met the other agency's trainees for the first time, including Bang Ye-dam from K-pop Star 2. In the free battle round, Chang-bin and Ji-sung performed 'Matryoshka' without Chan. Yang Hyun-suk and Park praised their performance.
