Does transforming keyrunes count towards Evolve?
No, Evolve triggers on creatures entering the battlefield, and the Keyrune must necessarily be on the the battlefield to use its ability.

Changing an object's characteristics (power, toughenss, type, etc) does not cause it to enter or leave the battlefield.




  702.99a Evolve is a triggered ability. “Evolve” means “Whenever a creature enters the battlefield under your control, if that creature’s power is greater than this creature’s power and/or that creature’s toughness is greater than this creature’s toughness, put a +1/+1 counter on this creature.”