a stone for any Pokemon doesnt exist but i don't know if you can get it via action replay cause i don't have any action replay
No first you have to have the stage one down and you but the stage two on top of the stage one and that's evolving Pokemon. Hope this helps!!
=Maybe you meant evolving? to evolve or the evolution of .....=
In Pokemon Yellow Onix does not evolve, it is a one stage Pokemon.
No but if you wish to complete your pokedex without filling up the storage boxes you must and evolving is alot easier and cheaper to do than caching one of every stage. remember if you don't want a Pokemon to evolve just make it hold an everstone
Yes
the pokemon will just evolve when you get it to the next level
no, its a basic
It wont evolve it is in its last stage.
a new stage of what they were before
No.
Togetic will evolve into a togekiss when you use a shiny stone.
keep trading Pokemon with friends and train all your Pokemon to the stage where they stop evolving