Kirlia evolves from Ralts starting at level 20 and can evolve into two different Pokémon depending on certain conditions.

Final Evolution Options for Kirlia:

• Gardevoir: Evolves from Kirlia at level 30 through leveling up (most common method).

• Gallade: Also evolves from Kirlia at level 20 when exposed to a Dawn Stone, but only if the Kirlia is male.

Summary:

• Level for evolution into Gardevoir: 30
• Level for evolution into Gallade: 20, but requires a Dawn Stone and a male Kirlia.

Since your question asks specifically about the level at which Kirlia evolves, the primary answer is that Kirlia evolves into Gardevoir at level 30 through leveling up. If you want to turn Kirlia into Gallade, a male Kirlia must be exposed to a Dawn Stone at any level starting from level 20.