The trainees moved to their new groups, after which the new A class competed for the center position in "You're Mine (Pick Me)". Each individual trainee was given one minute to appeal to the lower classes, who proceed to vote for their center pick. HKT48's Miyawaki Sakura was chosen to be the center. After the live performance on M Countdown, the girls had their first meeting with Lee Seunggi, the national producer representative for the season. Lee Seunggi then announced the trainees' second mission - the group battle evaluation. 16 teams of 5-6 members are formed to compete for 8 given songs - AOA's "Short Hair", Red Velvet's "Peek-a-Boo", GFriend's "Love Whisper", I.O.I's "Very Very Very", Blackpink's "Boombayah", AKB48's "High Tension", Kara's "Mamma Mia" (JPN Ver.), and Twice's "Like OOH-AHH" (JPN Ver.). As the center, Miyawaki Sakura was given the privilege of picking her team first, with the rest of the team founders chosen through a random draw. The team founders then competed for songs through a foot race. The 8 teams who managed to secure a song were able to choose their desired opponent from the losing teams. The episode continued with the groups practicing and assigning positions such as leader, center, main vocal, etc. Each song was then performed live by the two groups, with each individual being voted on separately by the audience. The winning team was determined by combining the group's individual votes. Members from the winning group received a benefit of 1000 votes each, which would be added to their online votes for the first ranking announcement. Ranks 1-58 would advance to the next round, while 59 and below were eliminated from the competition. Only the two teams performing "Love Whisper" were shown performing this week.
Some of the performance were performed on episode 3, and the rest were on episode 4. This is a complete list of this challenge's performances. For a list that includes the vote count, visit the Group Battle Evaluation page.
*This is only the top 12 of the episode.