my theory on the history of Magikarp

i was doing some research on pokemon myths in the Canalave Library and one read:
"Pick clean the bones of Pokémon caught in the sea or stream. Thank them for the meals they provide, and pick their bones clean. When the bones are as clean as can be, set them free in the water from which they came. The Pokémon will return, fully fleshed, and it begins anew."
i was trying to think what pokemon this could be. first i thought of the fossil pokemon, the i looked it up on search engines, and Manaphy came up. so i thought that the pokemon returning could have been Phonie. then i talked to people about pokemon of the seas and rivers, and Magikarp came up. according to pokedex data, it may have been that Magikarp was strong in the ancient world, unknown how he survived till now though because he is the weakest pokemon. well i think maybe Magikarp was strong in the past, but had a weak exterior, also had "magic" powers, hence the name Magikarp, one power could have been reqeneration. because of it's weak outer shell it was easily killed and meat eaten, by old pokemon and cavemen, then regenerated and reappered in the rivers and seas, and then over the years evolved to have a hard shell(shown through the T.V. show once), and not needed to be so strong
what do you think about my theory?

thanks Oak, thought you would like it