Go to pokégear>>online play>> register. Choose an username and password. Then trade>> wait for a request. Just tell me the username you chose and I will send you a request
Charmander is amazing Chikorita is a pain to lvl up but very usefull against boss battles. Piplup is really the worst. Not usefull against early gym leaders and when you get to the fairy/fire gym, you already have better options.
Imposter ditto with Choice Scarf If you face a pokemon who is setting up (dragon dance, quiver dance,...) It will keep those boosts and it will always move first You can only use him for 5 turns because of pp but it's very usefull for checking the opponents moveset