When I looked on the wiki page for Holon Volcano,it said underneath the steps for encountering Delta Remoraid that encountering it breaks the fishing feature completely.Does that mean that if I go to catch Delta Remoraid,I won’t be able to fish anymore?
This is correct, however, it does not impede on surfing, so you can get all the mons anyways, without fishing.
Except there are Pokemon that can only be found by fishing.
Which ones? Lumineon can be encountered by surfing in Route 17, other than that, you should be able to obtain all mons somewhere besides fishing if you’ve already caught delta remoraid.
Busculin at Holon Lake.
You can get Basculin with friend safari.
I can’t access any online features because I play on a school computer.