Jirachi evolves neither to anything, nor from anything.

Type: Steel - Psychic
Species: Wish
Ability: Serene Grace
Height: 1'0"
Weight: 2.4 lbs

Jirachi has the ability to grant wishes and its signature attack is Doom Desire.

Jirachi spends most of its time asleep and is only awake for seven days once every 1,000 years when a voice of purity sings to it. During this time, Jirachi has the power to grant wishes. It has a child-like personality.

Pokedex Entries

Ruby- A legend states that Jirachi will make true any wish that is written on the notes attached to head when it awakens. If this Pokémon senses danger, it will fight without awakening.

Sapphire- Jirachi will awaken from its sleep of a thousand years if you sing to it in a voice of purity. It is said to make true any wish that people desire.

Emerald- Jirachi is said to make wishes come true. While it sleeps, a tough crystalline shell envelops the body to protect it from enemies.

Firered and Leafgreen- It is said to make any wish come true. It is only awake for only seven days out of a thousand years.

Diamond and Pearl- It is said to use its power to fulfill any wish within the 7 days it awakens every 1000 years.

Sprites

Ruby and Sapphire

Front back

Diamond and Pearl

Front(shiny) Back (normal)

Trozei


Other