Just dive underwater and find grass where relicanth is and use sweet scent.
No only in ruby and sapphire and emerald.
You can't catch Relicanth. You have to trade from Ruby, Emerald, Sapphire or any other game that has him captured.
Catch Clamperl, Chinchou and Relicanth most of these Pokemon hold shards
Relicanth is rare. They'll only appear if you go underwater on Routes 124 and 126.
It's called Relicanth, it's a rock fish, you catch it at the bottom of the ocean. -Catsura
you must go to the way you entered sootopolis city . in the underwater place if you search you can catch a relicanth
NO.
A relicanth cannot be caught in leafgreen but you can catch one in ruby, sapphire, and emerald.
it doesn't evolve in Pokemon ruby.
They're a rare Pokemon you can find underwater just outside of Sootopolis. Other than in Ruby, Sapphire and Emerald, you cannot obtain them.
Tentacool, Relicanth.
you get relicanth from underwater grass near sootopolis but it is very rare and hard to catch so bring a few ultra balls with you