>>40144408From episode 1 of SM to episode 20 almost every development episode was tied to Ash and his Pokémon. Each classmate got their obligatory introduction episode which only takes up 5 out of the 20.
From episode 21 to 39, every classmate once again got one episode for themselves, while the rest were focused on Ash or were just filler.
From episode 40 to 60, majority of the episodes focused on Ash and Lillie, while Lana and Soph got one episode, Mallow and Lana shared one, and the rest were filler.
From episode 61 to episode 80, once again, every classmate got one episode to themselves and the rest was filler or focused on Ash.
81 to 100 Lana got two episodes while the rest got none. Mallow and Lillie had small moments in one episode each though. The rest was once again filler or focused on Ash.
Finally, from 101 to 127, every classmate got one episode each, Lana and Soph shared one, Mallow, Ash, and Lillie shared one, and the rest focused on Ash, filler, or Lillie. Every episode onward is focused on the League and everyone who competed.
So over the course of 138 episodes so far, each character besides Ash and Lillie have gotten 4-7 episodes. Significantly less than Clemont who got the least amount of episodes out of the XY cast, that being 14. But muh random OCs taking focus right?