Get it to level 31.
Roserade doesn't evolve. If you mean Roselia, you need to use a dawn stone on it to make it evolve.
You'll need to make it happy at day time.
There a lots of ways to evolve Pokemon in Pokemon platinum. 1. When some Pokemon reach a certain level they evolve. 2. For some Pokemon like eevee u have to use an evolutionary stone. 3.To get eevee to Umbroen or Espeon u have to make eevee have max happiness. Then level it up in the day and u get espeon and level it up in the night and u get umbroen. 4. Some Pokemon such as riolu and togepi require to be happy to evolve. 5. For Pokemon like haunter u have to trade a it. As soon as it is traded it will evolve. 6. Some Pokemon like legendary Pokemon can't evolve.
It depends in how many times you use it in battle, if you use him allot and he levels up soon he will evolve.
On Route 212, a trainer has it. That is, if you just want to see it to complete the dex. There is no where to catch it on platinum, though. You'll have to make an eevee happy at night to make it evolve into an umbreon.
You give it a protector and trade it.
give it to rydon and trade it to make him evolve
Porygon doesn't evolve at a level. You need a special item to make it evolve.
no, you push b when you do not want them to evolve. To make them evolve, you have to raise them to a certain level.
You have to make it hold a Electriczor and trade it.
get a magmar make it hold it then trade it, it will evolve into magmortar
just raise it to level 33
Roserade doesn't evolve. If you mean Roselia, you need to use a dawn stone on it to make it evolve.
You make it become friends with you, you should get Pokemon heartgold or soulsilver
Chingling will only evolve into Chimeco if it's happiness is full at night time.
You'll need to make it happy at day time.
you make it hold a razor claw and level up at night.