Every time I play locally, I get a Magikarp or two near the river. But they are so weak! I caught 43 magikarps already and I am at level 20 and yet still my strongest Magikarp has only 129 CP!! What is going on? Are your Magikarps any better?
Most of mine have literally 10cp.... Ugh.
I've got 335 out of 400 magikarp candies now. Nearly there. Still, my best Magikarp is CP 144
I only just evolved my Magikarp recently, it was something like 147 CP and evolved into around 1400, I now powered him up to approx 1600. But with more candies I can power him up even more. He's very powerful in gyms - one of my favourite guys!
Finally got a Gyarados. Evolved and powered him up to CP 2516 - not bad! Didn't think you could do it from Magikarp CP as low as 140.
I have 5 from level 10 to 119. I haven't found very many of them so it's going to take me forever to get a Gyarados!
They tend to be near the water, I live by the canal so get one (or more) every day, but even then 400 Magikarps is a long hard slog! It helps if you hatch some from eggs because that way you get quite a few candies with it.
I wish I was near water!
Makes a massive difference. I'm lucky.