Boku no Hero Academia Season 5, Episode 3 ("Clash! Class A vs. Class B!") initiates the Joint Training Arc with the first round of mock battles between Class 1-A and Class 1-B. The episode heavily features Hitoshi Shinso's debut with Eraser Head-inspired support gear, alongside developments regarding the "Quirk Singularity Doomsday Theory". For more details, visit Crunchyroll .