Relicanth

Relicanth does not evolve.

Pokémon Ruby

"RELICANTH is a POKéMON species that existed for a hundred million years without ever changing its form. This ancient POKéMON feeds on microscopic organisms with its toothless mouth."

Pokémon Sapphire

"RELICANTH is a rare species that was discovered in deep-sea explorations. This POKéMON’s body withstands the enormous water pressure of the ocean depths. Its body is covered in tough scales that are like craggy rocks."

Pokémon Emerald

"A POKéMON that was once believed to have been extinct. The species has not changed its form for 100 million years. It walks on the seafloor using its pectoral fins."

Pokémon FireRed

"It has remained unchanged for 100 million years. It was discovered during a deep-sea exploration."

Pokémon Diamond

"A rare Pokémon discovered during a deep-sea exploration. It has not changed in over 100 million years."

Pokémon HeartGold

"Discovered by chance during deep-sea explorations, it has not changed since ancient times."

• 
  Squirtle
• 
  Wartortle
• 
  Blastoise
• 
  Psyduck