I get lots of magikarps at work.
I had hit level 9, got a lucky egg and saved it, started amassing lots of Pidgeys, Weedles and Caterpies to evolve. Hit level 10, got another lucky egg, then evolved all I could, including a psyduck, so now I have a golduck, and it is pretty powerful at 612. I am now level 12.
My favorite so far is the Vulpix I hatched yesterday.
Most powerful is Pidgeot at 623. Just waiting until I can evolve my three Evees.
My university campus has dozens (at least) of pokestops and I am bringing my son and DH (who doesn't play) to visit my gallery exhibit before I pull it down next week.