Lamantine

Red / Blue: Stores thermal energy in its body. Swims at a steady 8 knots even in intensely cold waters.

Yellow: Its entire body is a snowy-white. Unharmed by even intense cold, it swims powerfully in icy waters.

Gold +2: Its streamlined body has little drag in water. The colder the temperature, the friskier it gets.

Silver / SoulSilver: It loves frigid seas with ice floes. It uses its long tail to change swimming direction quickly.

Crystal: It sleeps under shallow ocean waters during the day, then looks for food at night when it's cold.

Ruby / Sapphire: DEWGONG loves to snooze on bitterly cold ice. The sight of this POKéMON sleeping on a glacier was mistakenly thought to be a mermaid by a mariner long ago.

Emerald: It loves to snooze on bitterly cold ice. The sight of this POKéMON sleeping on a glacier was mistakenly thought to be a mermaid by a mariner long ago.

FireRed / X: Its body is covered with a pure white fur. The colder the weather, the more active it becomes.

LeafGreen: It stores thermal energy in the body. It swims at a steady eight knots even in intensely cold waters.

Diamond +4: In snow, the pure white coat covering its body obscures it from predators.

Black 2 / White 2: Its streamlined body has low resistance, and it swims around cold oceans at a speed of eight knots.

Omega Ruby / Alpha Sapphire: Dewgong loves to snooze on bitterly cold ice. The sight of this Pokémon sleeping on a glacier was mistakenly thought to be a mermaid by a mariner long ago.

Ultra Sun: It swims through the ocean at a speed of eight knots, searching for Pokémon that will become its prey. It’s especially fond of Wishiwashi.

Ultra Moon: It sunbathes on the beach after meals. The rise in its body temperature helps its digestion.

Let's Go Pikachu / Let's Go Eevee: Its entire body is a snowy white. Unharmed by even intense cold, it swims powerfully in icy waters.