Well they're mainly games for children and I'm no longer a child, hence I outgrew them. There was nothing that requires any explanation.

I outgrew Pokémon because they're also for small kids. 

Yes, I'd like a real Paper Mario on Switch, please Nintendo! You let Zelda go back to its roots, let Paper Mario!!!

Poekmon is not for small kids. Mario is not for small kids. Leapfrog, and Elmo's 1,2,3's... now that is for small kids. See the difference? You're confusing games that are everyone with games that are for small kids. 

You can like whatever you want... but the "kiddy" thing isn't factual, at all. 

Only if it is like Super Paper Mario on Wii. I don't like the others I've played, especially the disappointing N64 one that was attempting to be a sequel to Mario RPG.

They are for small kids, Pokémon involved you playing as a little kid who goes around catching cute little monsters. Mario is obviously for kids.

That's not the same as being childish but they are made for small children and as an adult I've long outgrown them. 

If Mario were made for small kids, the Japanese version of SMB 2 wouldn't exist. 

A Paper Mario game in the style of the first two titles???
Sure...