The best place to catch relicanth for me is the dark spot in sootopolis where you use dig. it took me 2-2 1/2 hours but i finally caught one. Then the next day, I came back and caught 3 more.
no you do not have to catch a relicanth to get a rayquaza
There are various reasons that Relicanth is hard to catch. For example, the area where it can be encountered can move.
you must go to the way you entered sootopolis city . in the underwater place if you search you can catch a relicanth
you have to catch wailord and relicanth then put wailord at the front of your party and relicanth at the end of your party then you go to an underwater place that gives you the location of registeel.
You can catch it when you use dive.
You find relicanth underwater near sootopolis city.
You can't catch Relicanth. You have to trade from Ruby, Emerald, Sapphire or any other game that has him captured.
you find it underwater
Around sootopolis in the seaweed
on route 4
route 4
To catch relicanth use Hypnosis by Gengar and get lots of Dive Balls