Goldeen is a white, fishlike Pokémon with orange markings. It has circular blue eyes with orange lids and prominent pink lips. On its forehead is a large horn, which is larger on a male than on a female. It has a small, wavy dorsal fin surrounded by an orange patch and long pectoral fins with orange markings at the bases. Goldeen's billowing tail fin is orange around the base and turns white toward the edges. Its tail is admired by many for its beauty and similarity to a ballroom dress.
Goldeen has a wild temperament and will use its horn to smash its way to freedom if kept in an aquarium. It competes with others of its kind to determine which has the strongest, thickest horn. Humans swimming near it must exercise caution lest Goldeen rams them. Goldeen is a very common sight in any body of fresh water, including ponds, lakes, and rivers. It can be seen swimming upstream in large schools during the breeding season in spring. Its strong fins allow it to maintain a steady speed of five knots while swimming upstream. It is known as the "Water Dancer" due to its elegant movements in the water. In the past, Waterfall was its signature move.
When released from a Poké Ball, Goldeen will use Splash, having no effect on the battle.
Goldeen is also a Pokéfloat. It will appear from the bottom of the screen but quickly drop down to the bottom again, knocking out any character it hits.
These Water-types are often referred to as "water dancers," as their elegant fins make them incredible agile underwater. They can even travel upstream in rapids at a speed of five knots; of course, they're not quite as nimble on dry land. Goldeen's Horn Drill is so strong that it can KO an enemy with one strike if it connects.
Goldeen will sometimes be found in a Poké Ball and will use Splash when released. It does nothing to affect the battle. On the official blog, Masahiro Sakurai commented that Goldeen appearing at the most critical of times is in keeping with Murphy's Law.
"A Goldfish Pokémon. In contrast to its elegant appearance, it has a wild temperament, and its attack with its horn is severe. Among the techniques it can master, Horn Drill is especially reliable. It evolves into Seaking, but if raised without evolving, it can learn the powerful Bug-typeMegahorn. There are male and female Goldeen--the male's horn is longer."
Goldeen will sometimes appear from a Poké Ball or even a Master Ball. As in the previous games, it uses Splash when released, having no effect on the battle.
Goldeen also appears as a trophy in both versions of the game.
NA: This Water-type Pokémon sports a fancy horn on its head. An excellent swimmer, it can literally swim up waterfalls. In the world of Pokémon, this elegant Pokémon has a variety of effective moves in battle. In Smash Bros., however, all it can use is an ineffective Splash attack.
PAL: A Water-type Pokémon with a distinctive horn. Thanks to its powerful fins, Goldeen can swim comfortably through the most torrential waters and even up waterfalls. It's known for both its strength and grace. That said, don't expect it to make a big splash in this game - just a little one when it uses Splash... It's super ineffective!
Goldeen seems to be based on a goldfish, specifically the tosakin (curly fantail) breed due to its red and white scales and flat tail. It may also be based on the kōhaku breed of koi fish. Its billowing tail and prominent red lips and eyelids give it a feminine appearance reminiscent of a queen wearing a dress and makeup. Its horn may be a reference to Matsya, a giant horned fish that is one of the avatars assumed by the Hindu deity Vishnu.
Goldeen may be a combination of goldfish and queen (referring to its feminine appearance and as a contrast to king in Seaking).
Tosakinto may be derived from とさきん tosakin (the curly faintail goldfish).