There are two ways to evelove Pokemon in Pokemon platinum by lefstones and leveling up.
You can find stones undergrounds.
Togetic into Togekiss and Roselia into Roserade
Pokemon evolve when you level them up to a certain level, by trading them, by friendship, or by using stones.
Effects:Causes Gloom to evolve into Vileplume.Causes Weepinbell to evolve into Victreebel.Causes Exeggcute to evolve into Exeggutor.Causes Nuzleaf to evolve into Shiftry.
Depends what kind of pokemon. Most evolve by leveling up, some using stones (firestone, moonstone, etc) some by trading, and some by trading holding a specific item.
Going underground and digging will get you evolution stones more-so after you obtain the national pokedex Hope I helped =p
it matters what Pokemon you mean. Most Pokemon evolve by leveling up, others with stones and items, some by friendship or condition (some at certain times), and still more by trading!
Yes. You can also find various other stones to evolve Eevee into other evolutions.
You will need 100 thunder stones. That's a lot!! It may sound unbelievable but it is true!!!
witch Pokemon evolve with stones in soul silver
evolve nidorina and nidorino
Some Pokemon evolve by training, trading or stones so it depends really but if you mean training then give them an EXP share and go through the Pokemon league over and over again.