The whole point of magikarp having crappy stats relates to origin story.
"After the intro, you go through and defeat the Kanto League, but once you reach the Champion, nobody's there. An Alien Dratini then crashes down. After you defeat it, it joins your party or goes to your box. You then travel to the Aziro Region to find some rarer Pokemon, and defeat the Aziro League. Once you defeat the evil team of the Aziro Region -- Team Alloy -- you travel to the Teyal Region and enter the Demon Realm. You challenge demons, and defeat them to save the world, and bring the light back to the Teyal Region. You can then do the aftergame of the Teyal Cup, or the Alien Rally!"
Erm....... creative.
"Crystalline Type, exclusive to Aziro Region Pokemon.
Demonic Type, exclusive to Teyal Region Pokemon.
??? Type, a very illusive type."
Type mechanics?