NAMES
Here you see the japanese names and the meaning of the names

Mew: Myuu
comes from: cat's sound

 Celebi: Serebii
comes from: Cele (celestial)& bi (by and by)

jirachi: Jiraachi
comes from: wish in Russian

Latias: Ratiasu
comes from: from lateo, meaning "hidden" in Latin

chimecho: Chriin
comes from: Chime + echo