In episode 22, Kumojacky averts Villain Forgot to Level Grind by inventing a new move: Typhoon Punch! And Blossom manages to tie with it but countering with her own move: Blossom Screw Punch!
Episode 23. Cure Sunshine's debut.
The entire episode 34 is one for Yuri/Cure Moonlight as she returns to action and not only defeats Dark Precure, but the Desert Apostle trio her comrades were struggling against as well.
The ending of episode 36 debuts the ending image song Heart Goes On as the two victims of the week rejoin their band as they perform the song with the fashion clubs presentation, ending the school festival and all the work everyone's put in the last 4 episodes on a high note.
The four Cures combining their powers to defeat Dune's Messenger in episode 37, followed by Itsuki, Yuri, and Erika overcoming their Secret Test of Character. That just leaves Tsubomi who...
in the next episodes realizes that she can grow past her shy side. With all four Precures, they create Super Silhouette, enough to obliterate a Desert Devil, one of the strongest beasts up to that point.
In Episode 39, Erika slide tackles a bunch of Snackeys without even transforming.