Starmie

“Its central core glows with the seven colors of the rainbow. Some people value the core as a gem.”

— Pokémon Red

“The center section is named the core. People think it is communicating when it glows in 7 colors.”

— Pokémon Yellow

“The center section of its body is called the core. It glows in a dif­ ferent color each time it is seen.”

— Pokémon Gold