As part of its ongoing efforts to promote every single Pokémon out there, The Pokémon Company has shared special content dedicated to Magikarp:
Did you know? It is virtually worthless in terms of both power and speed. It is the most weak and pathetic Pokémon in the world. This weak and pathetic Pokémon gets easily pushed along rivers when there are strong currents.
Source: The Pokémon Company
Source:Pokémon