The Zyuohgers are forced to battle one another in Episode 4 of Dobutsu Sentai Zyuohger: “Roar on the Ring”.
Episode 4: “Roar on the Ring”
Written by Junko Kamura
Directed by Hiroyuki Kato
Unable to let this go through, Sera, Leo, and Amu confront Amigard. However, their sloppy team coordination causes the capture of Sera and Leo.
Leo cannot battle all out with Sera, which reminds her of a martial arts tournament in Zyuland in which Leo also did not fight with all his strength.