Are you asking about the episode of Ma Xiao Bao Li? In that episode, everyone had a lovely symbol because of the rainbow sonic boom in Bao Yun. The answer is the first episode.

None of the six protagonists are cute signs that only appear in the feature film. There are cute signs after the first episode. This is just an episode of Memories: In order to find a way to get the cute sign, the boy scouts of the cute sign are going to ask Rainbow (Bao Yun) about her history of getting the cute sign, and how the six protagonists got the cute sign all the way. Finally, they know that the rainbow sonic boom of the rainbow has connected everyone, and finally Twilight City (Twilight Sparkle) comes to a conclusion.