Relicanth, a Pokemon essential for obtaining The legendary Golems, can be found underwater, just outside of the entrance to Sootopolis. Its pretty rare.
relicanth
on Routes 204/205/206
Nothing evolves into Relicanth in Pokémon Emerald.
no you do not have to catch a relicanth to get a rayquaza
Relicanth dont evlove period.
Underwater right beside/infront of sootopolis city
its not the best but it can help you find the regi's on emerald and ruby & saphire
no
You can find Relicanth underwater, but they are rare.
relicanth for sure.
You don't need to defeat the Pokemon league to find relicanth in emerald version you can find it anytime underwater near Mossdeep city its very rare to find though so you may have to stay in the grass underwater for a long time.
Relicanth are very rare, but you can find them on underwater routes 124 and 126.