125 of em evolve but I list them all
a Pokemon that has to be traded to evolve can be any lvl you want it to be you get it the Pokemon the same lvl that your Pokemon was it does not grow a lvl when it is traded
No, you must trade the certain Pokemon that need to be traded to evolve to make them evolve.
Clamperl when traded
Gravler has to be traded to evolve.
It will only evolve it if is traded.
Lombre can evolve into Ludicolo with a Water Stone (Lombre can also be traded to evolve).
By being traded
No. It evolves when it traded
It will evolve to Machoke about level 28. Machoke will evolve to Machamp when traded.
If you mean evolve, get a Pokemon, eg Buizle, and get it to a high level. In Buizle's case you need to get him to level 30. But some Pokemon need to be traded to evolve. Like Kadabra, Machoke and Gravaler. But others need to hold and item and be traded like Rydon must hold the Protector and be traded to evolve and Dusklops must hold the Reaper Cloth and be traded to evolve. Then Clampearl must hold the deep sea scale or the deep sea claw to evolve. Then there are some, like Palkia, Dialga and Giratina that can not evolve. Ledgondaries are unable to evolve and you will get the odd Pokemon that can't evolve like Parchirishu and Farfeched. And Pokemon that are at their last evolvment will not evolve again, like Pidgeot, Floatzel, Roserade, Stunktank and many more.
Haunter evolves when traded
machoke evolves after traded