Jirachi is a small, white, humanoid Pokémon. It has short, stubby legs and comparatively longer arms. There are flaps on the underside of its arms, which give the impression of long sleeves. On its belly is a curved seam, which conceals a third eye, known as its "true" eye. Additionally, Jirachi has a normal pair of ovalish eyes on its face, with small, blue triangular markings underneath. On its head is a large, yellow structure with three points extending outward: one from the top and one on either side. On each point is a teal tag, known as a "wish tag". A rounded extension hangs from either side of the yellow structure, framing Jirachi's face. Two yellow streamers flow from Jirachi's back, resembling comet tails.
Jirachi hibernates for extensive periods, forming a protective crystalline shell as it sleeps. However, it is still capable of fighting while asleep if it is in danger. It awakens for seven days every thousand years, but can also waken if sung to by a voice of purity. During the short periods when it is awake, Jirachi is said to grant wishes. However, in the anime, Jirachi cannot create an object that is desired from a wish. Instead, it teleports the desired object to the person that made the wish. In the Pokémon Adventures manga, Jirachi's wishes are granted by writing on the three tags located on its head. Due to only having three tags, Jirachi can only grant three wishes. The anime further reveals that Jirachi's awakening is linked to the Millennium Comet and that its third eye has the ability to absorb the energy Jirachi needs for hibernation. Although it is extremely rare, Jirachi can be found in the mountains. Jirachi is the only known Pokémon capable of learning the move Doom Desire.
Jirachi debuted in a major role in Jirachi: Wish Maker. It was revealed to only awaken during the week of the Millennium Comet, where it would search for a partner to be its friend, with the honor in the movie going to Max. However, by the end of the movie, Jirachi went back to sleep, much to Max's sadness.
Jirachi made its main series debut in Searching for a Wish!. A young girl named Gemma had been in pursuit of Jirachi, since she wanted it to grant her wish to restore her valley to the vibrant land it once was. Jirachi was initially shy towards her, but in the end, it warmed up to her and granted her wish before falling asleep again.
Jirachi appears as a rare Poké Ball Pokémon in its first appearance in the Super Smash Bros. series. The chance of it appearing is 1 in 493 (the amount of Pokémon in the Generation IVNational Pokédex). Like the other "secret" Pokémon, it drops rare items before flying away. In Jirachi's case, the items are stickers.
A Wish Pokémon. It's said to awaken for seven days once every thousand years, with the ability to grant any wish asked of it. It is truly a Pokémon of which dreams are made. In combat it uses its wish power to attack. Its attack, Doom Desire, which causes light to rain down from the heavens to do tremendous damage, is especially powerful.
Since Jirachi is only awake for seven days every one thousand years, it's an even bigger sleeper than Snorlax! It can't just be sleeping the whole time, though. It's probably hard at work deep in the land of dreams, strengthening its ability to grant people's wishes. If it detects danger while asleep, it can fight without even waking up!
Pokémon Pinball: Ruby & Sapphire: While in the Ruins, one of the slot machine prizes is the chance to capture Jirachi. Jirachi will move around and must be hit three times in 30 seconds for the capture to be successful. There is only one chance per pinball game.
Jirachi’s wondrous power allows it to grant any wishes written on the notes attached to its head. I hardly dared hope when we first saw its crystal shell, but I’m so glad we were lucky enough to encounter it!
In Pokémon GO, Jirachi can be obtained by completing the Special Research, A Thousand-Year Slumber.
When attempting to catch Jirachi in Pokémon Go, several Pokémon can be seen singing in the background. Jirachi is one of very few Pokémon, like Meloetta, with a unique catch environment in Pokémon Go.
Despite being legitimately obtainable in earlier games, Shiny Jirachi were previously locked out of Generation VI's Wi-Fi features prior to an update; this makes Jirachi the only Pokémon to have undergone this kind of issue.
Jirachi appears to be based on the concept of "wishing upon a star" - the practice of making a wish while observing meteors in the night sky. Its pointed head is shaped like a literal star, and its Steel-type may be a reference to iron meteorites. The tags of paper on its head resemble 短冊 tanzaku, strips of paper on which wishes are written during the Japanese festival たなばた Tanabata, also known as the Star Festival. The fact that it is awake for only 7 days may be a reference to how the festival always takes place on the 7th day of the 7th lunar month. Its thousand-year sleep followed by a short period of consciousness may be a reference to comets, most of which are visible from Earth only once in a lifetime, and the two long streamers attached to its body resemble a comet tail.
Its humanoid appearance and ability to grant wishes may also be inspired by Arabic myths about the jinn, also known as genies. In some folk tales such as Aladdin, imprisoned genies would grant wishes to the person who released them.
Jirachi may be derived from желать zhelatʹ (Russian for to wish). It may also involve jinn or 幸 sachi (Japanese for fortune).