on Pokemon diamond or pearl just get a lot of rare candies and give tham to your Pokemon
or if you cant find any go to the day care lady let her raise your Pokemon until there 1 level below the level that he/she ivolves at then level him/her up simple hope i helped
There are two ways to stop a Pokemon from evolving. The first is to give it an everstone, which prevents you from working everytime the Pokemon is ready to evolve. The second way is to press "B" when the Pokemon is evolving. If you did neither, then your Pokemon is not ready to evolve.
There is a way to stop Pokemon from evolving. You let the Pokemon hold a certain stone.
only way is to trade from another Pokemon game
Well the easiest way is evolving an Axew.
The only way is to trade a Pokemon holding a quick ball from ruby, sapphire,emerald
If you REALLY want a Snubull, you can go to the GTS (if you have Wi-Fi), and offer a legendary or a shiny for a Snubull. It'll get taken really quick depending on the Pokemon. But only do this if you really want one. Don't waste your good Pokemon.
it means its evolving. when it evolves, its apperance changes. not only that but it gets stronger as it levels up & it can learn new attacks. evolving them is a great way to win battles w/ them.
some only evolve by using a evolving stone there's alot of those in pokemon platinum but you can only use the evolving stone on them when there a certain level or the best way train them faster cause them evolving doesn't make the, stronger just changes there look.
The easiest way is to use the Poke'Radar.
There really isn't a quick way to get to level 100 fast without cheating. The best way would be to re-battle gym leaders and the elite four, along with wild pokemon. Sorry, you'll just have to be patient.
with action replay
I would suggest geodude if you really want it to evolve because it evolves into graveler and can easily be found in a cave if you look hard enough. But since evolving isn't exactly the best way to get stronger, if you really want a strong Pokemon, try to get a ground Pokemon or a ground rock Pokemon like onix, even though it is pretty hard to evolve it into steelix.