2 pokedex entries by m.o.a
Staryu's limbs are constantly growing. Unless it battles consistently, its limbs continue to grow to lengths that are disproportionate and potentially harmful to its health.
Starmie's limbs can be cut off or detached without much harm to the Pokémon itself. Whenever a new limb is regrown, it can change colors to match one of the seven colors of the rainbow.