What is the best level to evolve Magikarp?

Magikarp will start trying to evolve once it reaches level 20. The answer to the question is that magikarp evolves at level 20, regardless of which game it is present. It evolves into gyarados starting at level 20.

Is it worth evolving Magikarp Pokemon go?

As any Pokémon fan will know, Magikarp’s evolved state is none other than the mighty Gyarados, an epic water dragon and one of the most powerful creatures in the Pokémon universe. You also get a huge boost in CP when you finally evolve a Magikarp.