I belive it is on level 20
Level 20.
Level 20
Ralts evolves at level 20
Ralts evolves into a Kirlia at level 20.
At Level 20 it evolves into Kirlia, then at Level 30 it evolves into Gardevoir. OR, if you have Diamond, Pearl or Platinum, you can use a Dawn Stone on a male Kirlia to evolve it into Gallade.
Level 20
Ralts evolves into Kirlia at level 21. Hope I helped! :)
On level 20
level up Ralts to 20 let it evolve then and then 30 to Gardevoir. I find it easier if yo let ralts level up to 29(better if you have an everstone) let it evolve then to 30.
you have to evolve a ralts to get kirlia in pearl diamond platinum ruby Sapphire or emerald ralts evolves at level 25 to15 depending on the nature but u have to have its happyness realy high
Ralts will evolve at level 20 into Kirlia. From there it will change into a Gardevoir at level 30. However, in Emerald version you can not evolve Kirlia into Gallade
Ralts evolves into Kirlia at level 21. Hope I helped.