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.
No only in ruby and sapphire and emerald.
When you're in the Sealed Chamber, Relicanth should be first and Wailord should be last.
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.
A relicanth cannot be caught in leafgreen but you can catch one in ruby, sapphire, and emerald.
Relicanth appears in Pokemon Ruby, Sapphire, Emerald, Diamond, Pearl, Platinum, Heartgold, and Soulsilver. In Ruby/Sapphire/Emerald you can catch it pretty much anywhere in the Underwater, using Dive in the sea. In Diamond/Pearl/Platinum, you can catch it by using a Super Rod on Route 226. And in HeartGold/SoulSilver, you catch it on Route 12.
no you do not have to catch a relicanth to get a rayquaza
you will find relicanth underground under sotopolis city (note relicanth is super rare it will take for ever to find
Relicanth is notoriously hard to catch. It is possible, however, to get on in the underwater-seaweed areas outside and around Sootopolis City. It may take a while to get one, but be patient. They are there, but only have a 10% find rate.
Yes, it always has to be Wailord and Relicanth - Relicanth in the first slot and Wailord in the last in Ruby and Sapphire, and Wailord in the first slot and Relicanth in the last in Emerald.
there is a slight chance of a Relicanth holding one when you catch it wild. you can also find the underwater and on beaches in pokeballs on route126