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Pokemon that evolve through trading
Among pokemon, some only evolve upon being traded.
Meaning that, in order to get all pokemon, you have to trade.
We want you to pay attention here to the fact that when they evolve they become a different creature.
In other words, even if you do register the preevolution, it won't remain in your possesion.
If you want to fill the dex, you will have to catch another one.
It levels up faster when traded?
Pokemon you obtained through trading grow at a 1.5 rate faster than usual.
Pokemon obtained by trading that are at a level above the one you can control will do what they want, but pokemon that return to you after being given to other people will remember your name and obey you.