>>41792822Most trainers and trainer classes just use Pokemon as pets and friends and have other goals and hobbies, and the Pokemon that they have are based on said goals and hobbies. To not mention that you have to raise and feed all of them.
Only the people dedicated to the sport and travel bother with making a huge team.
This to not mention that R/B implied that Pokeballs were a recent creations, making having a lot of Pokemon impractical and reinforcing the need to just have 2 or 3 as pets.