Gallade wasn't even made until Gen. 4, thus it didnt exist in Emerald, meaning Gardevoir is better in this situation. EDIT: You can't make Kirlia evolve into Gallade because Gallade does not exist in Emerald, therefore you have to evolve Kirlia into Gardevoir.
How do you evolve Kirlia into Gallade in Emerald?
Evolve your male Kirlia in Gallade with a Dawn Stone.
At level 30, Kirlia will automatically evolve into Gardevoir, and you will lose your chance to obtain Gallade with that Pokémon.
Can a male Ralts evolve into Gardevoir in Emerald?
2 Answers. Yes, there can be a male gardevoir. After it reaches level 30 kirklia evolves into gardevoir. If you use a dawn stone on a male kirklia it becomes Gallade.