>You could easily play through the whole game without knowing Slugma, Misdreavus, Chinchou, Delibird, Skarmory, Gligar etc. even exist
This is not an issue since these games are almost 2 decades old and everyone here knows the Pokemon you listed.
Additionally, you were expected to explore new locations and find some Pokemon yourself.
Additionally, you could use a guide, anime or Internet to get more Pokemon info.
Additionally, there are these things called remakes which fixed distribution a bit.
Additionally, back in the day, men didn't have man-vaginas like you and dealt with issues like "muh Pokemon distribution" instead of complaining like a little gay boy.
And before you reply - there is nothing you can say that I will take seriously because you are complaining about finding monsters in monster-collecting game in 2018. Apply yourself, faggot.