POKEMON Which Generation brought more to the table?

[_crazy_man_]

Gen 2 and Gen 3 from a competative metagame standpoint.

 

Gen 2 added:

Breeding (also Genders and Baby pokemon)

Steel and Dark types

Equipable Items

Poke'rus

Shiny Pokemon

IV's inheritance

 

Gen 3 added:

Abilities

Natures

Weather Conditions

Double Battles

International Trading

EV, IV, and Shiny Pokemon system overhaul (nearly same system today)

Upgrade to 60 FPS (been that way ever since)