Glaceon is a quadrupedal, mammalian Pokémon covered in light-blue fur. It has long, pointed ears, dark eyes, and a small nose. A teal crest with two dangling flaps adorns its head, resembling hair or headgear. Glaceon has two dark blue, rhombus-shaped markings on its back; the tip of its tail, feet, and flaps are the same shade of blue.
By controlling its body temperature, it freezes the moisture in the air, producing ice crystals or diamond dust surrounding it. It is capable of freezing its fur into sharp needle-like icicles, which it can fire at opponents or use as protection as it tackles at its prey. It can quickly drop its body temperature below −75 °F (−60 °C). Glaceon is rather popular in ski resorts due to its ability to create powdery snow. Those captivated by Glaceon's beautiful snowfall will be instantly frozen without realizing it.
Glaceon debuted in A Full Course Tag Battle!, where it was revealed that May's Eevee evolved into it prior to the episode's events. It was used to battle Dawn's Piplup in the Battle Stage of the Wallace Cup in Strategy With A Smile!.
In All for the Love of Meloetta!, Cynthia used her Glaceon to make some ice for Meloetta.
Virgil's male Glaceon debuted in Team Eevee and the Pokémon Rescue Squad!, along with an Eevee and her other evolved forms at the time, under the ownership of Virgil. He reappeared in a flashback in the next episode. In Lost at the League!, he defeated a Reuniclus during the third round of the Vertress Conference.
In Eevee & Friends, an artistic Glaceon was with an Eevee and its evolved forms, including the newly introduced Sylveon. It likes to decorate its room with elaborate ice sculptures.
In Turning Heads and Training Hard!, a wild Glaceon was summoned to help Ilima's Eevee perform Extreme Evoboost. In the Poké Problem segment of the next episode, it saw Ilima and Eevee off.
In Breaking the Ice!, a Glaceon nicknamed Mirche appeared under the ownership of Regina. It was very protective of Regina but became ill after using Blizzard too many times. It reappeared in a flashback in Reuniting for the First Time!.
A Trainer's Glaceon appeared in A Lean Mean Team Rocket Machine!.
In Giratina and the Sky Warrior, a Glaceon was together with an Eevee and the other six Eeveelutions at the time.
In PK19, a Glaceon was living on an icy island.
A Glaceon appeared in Sliding Into Seventh!.
In A Marathon Rivalry!, a Trainer's Glaceon competed in the Pokéathlon held in Camellia Town.
In An Old Family Blend!, a Trainer's Glaceon competed in the Lily of the Valley Conference.
In Tag Team Battle Inspiration!, Shauna's fantasy featured a Glaceon as she imagined what Serena's Eevee could evolve into.
In A Dancing Debut!, Sara Lee's Glaceon competed in the Couriway Showcase alongside a Leafeon. In Master Class Choices!, it and its Trainer were watching Serena participate in the Theme Performance at the Fleurrh Showcase Rookie Class. In Master Class Is in Session!, Glaceon competed in the Gloire Showcase Master Class with its Trainer.
A Trainer's Glaceon appeared in A League of His Own!.
In Loading the Dex!, a Glaceon, Gardevoir, and Lopunny were in a fantasy that Meowth had after an encounter with a Mimikyu. However, the trio was really Gastly, Haunter, and Gengar using illusory disguises.
In A Talent for Imitation!, the Pokédex image of a Glaceon was displayed.
In To Train, or Not to Train!, a Glaceon was at the Eevee Evolution Lab.
A Glaceon appeared in a fantasy in On Land, In the Sea, and to the Future!.
||Glaceon, the Fresh Snow Pokémon and the evolved form of Eevee. Glaceon can freeze the fur on its body, and make it stick out like sharp needles.
||Glaceon, the Fresh Snow Pokémon. Glaceon freezes the surrounding air by controlling its body temperature.
- Glaceon's Japanese name is the same as the English name of Glacia, a member of the Hoenn Elite Four.
- According to the Diamond and Pearl Pokédex, Glaceon, Leafeon, and Umbreon have identical footprints.
- As there is no Ice Rock in Pokémon HeartGold and SoulSilver, it is impossible to evolve Eevee into a Glaceon in these games. The same applies for Magnezone, Probopass, and Leafeon. All have to be traded from Pokémon Diamond, Pearl, and Platinum to be obtained.
- Despite Eevee being obtainable before the Pokémon League in Pokémon Black and White Versions 2, it cannot evolve into Glaceon or Leafeon until after the Elite Four is defeated. This is because the Twist Mountain, where the Ice Rock is located, cannot be reached until that point in the game, as the entrances to it and the Tubeline Bridge are blocked.
- Glaceon shares its category with Vanillite. They are both known as the Fresh Snow Pokémon.
- Glaceon was designed by Atsuko Nishida.
- In Generation IX, Glaceon is unable to learn Trailblaze via TM, while its pre-evolution and all of its other evolutions can.
Like many of the Eeveelutions, Glaceon shares characteristics with foxes, dogs, and cats. It may be more closely based on an arctic fox, due to their habitat. Assuming Leafeon draws inspiration from Siamese or other colorpoint cats, Glaceon may also draw some inspiration from them (especially blue points). Its "hair" resembles an ushanka or a scarf hat.
Glaceon may be a combination of glacier (a large, slow-moving mass of ice on land) or glace (French for ice) and eon (an immeasurably long period of time, possibly referring to how long evolution takes naturally). Eon is a suffix all Eevee evolutions share and was Eevee's English prototype name. Incidentally, its name is also an anagram of congeal (to become solid, usually by cooling).
Glacia may be derived from glacier. It may also involve grace.