I belive it is on level 20
Level 20.
Level 20
Ralts evolves at level 20
Ralts evolves into a Kirlia at level 20.
Level 20
Ralts evolves into Kirlia at level 21. Hope I helped! :)
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.
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.
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.
Ralts evolves into Kirlia at level 20.