Richie's Other Three Pokemon In Indigo Planteau

We all know he used Pikachu, Charmander and Butterfree. There were only gen 1 Pokemon in the league then. The clue is that he catches very much the same as Ash. My guess would be Spearow, Grimer and Primeape. He only used the other ones in the last battle which he lost.

Other then pikachu, charmeleon and Butterfree, he also has a pupitar named cruise and a tailow named rose.

https://bulbapedia.bulbagarden.net/wiki/Ritchie

As for the league we don't know