Yanma evolves to Yanmega once "Ancient Power" has been learnt. Once it knows Ancient Power, the next time it levels up, it will evolve into Yanmega.
Make it learn Ancient Power
Make it learn aceintpower and lvl it or just train it then it will learn aceintpower and it will evolve or lvl it once more
Get it to level 31.
give it to rydon and trade it to make him evolve
You give it a protector and trade it.
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.
Porygon doesn't evolve at a level. You need a special item to make it evolve.
get a yanma and teach it ancient power when it levels up it will evolve You can find Yanma in area 3 of the Great Marsh, it evolves at level 33, but it needs to know ancientpower i believe, and Yanmega does not EVOLVE
You have to make it hold a Electriczor and trade it.
just raise it to level 33
get a magmar make it hold it then trade it, it will evolve into magmortar
Roserade doesn't evolve. If you mean Roselia, you need to use a dawn stone on it to make it evolve.