Yes
You can, but you have a limit to specific levels and TM's that come with the trading.
Yes you can.
Yes
Yes you can
of course you can
Of course it can, golbat evolves into crobat if the friendship between it and u is good.
you cant
You can't
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yes, just go to any union room and trade with whoever u need too
'First catch upto 60 Pokemon before beating the Pokemon league. Then after beating them you will be back in your house. When you get out prof. Oak will be waiting outside to give you your national pokedex. '
Yes, you can. You just have to be lucky enough to find one. I found a shiny Swablu and now I have a shiny Altaria. I found my shiny Pokemon way before beating the elite four.