>>41656337just backtrack to the low level routes. in some games you cant even release all pokemon and the only way to circumvent this is leaving them at the daycare, which are usually pretty early on in games.
>N-NOOO BUT THE RANDOM ENCOUNTERS!!! sure it's gonna be a pain in the ass but you can still rngbullshit your way through it until the nearest pokemon center.
also you already have a fishing rod so you could just struggle against another shitty magikarp until you manage to somehow beat onestruggle only functions as max hp % damage from gen 4 onwards, in which case you'd get 4 hits maximum.
you really only need to find a way to level up enough to evolve into gyarados then go along from then, anon.