Eh guys.. It that normal that when your level > 5 then the pokekmun will start to get hard to catch? I seems have no issue to catch when I first start, pokekmun very easy to catch, even break from ball also wont cabut. But once level > 5 and it turn the dark side! Cabut whenever break from ball.

Yes do not waste your dust and candy. Keep it till you're like lvl20+
And keep all the pidgey/those worm thing (anything that cost only 12 candy to evolve)
Save it then use egg + evolve. BAM massive exp.

And if you're just starting the game, my advice is to choose charmander as starter. Of all 3, charmander is the most rare to find.
Oh yeah and another tips, when you evolve, dont necessary have to look at CP, instead look at the special power they have.

Bro getting 1 once a while is easy, try farming for 125 candy for it. 

reason for 125 candy is to evolve it Charizard