How many levels of evolution does Pokemon's dark phantom sweet firefly have?

Sweet fireflies belong to a treasure dream that cannot evolve.

Related introduction:

Just because the package doesn't evolve doesn't mean it's powerful. Some Bao Mengke, such as Queiroz and Skarmory, are close to the fully evolved Bao Mengke's ability; And some treasure dreams, like Love Fish and Pachirisu, are close to unexplored treasure dreams.

Some treasures can only evolve with a single sex, such as Sang Bei and Salandit, where only females can evolve, so males can't.

Extended data

Related background:

Sweet fireflies are only females, and their male counterparts are electric fireflies. Appeared in the animation "Electric Fireflies and Sweet Fireflies, Dance of Love", trained by Juliet. After Romeo was captured by the rocket, he was rescued by Peter, a domestic electric firefly, and fell in love with Peter. On the night of the festival, I danced with Peter and other fireflies and performed the dance of light.

From the fifth generation, if the mother who lays eggs is a sweet firefly or the parents are electric fireflies, then the offspring will be determined by sex. Before the fifth generation, fireflies and ditto laid eggs, and their offspring must be fireflies.

There are many ways in which Bao Kemeng evolved, and the most common one is that Bao Kemeng reached a certain level. Other evolutionary ways are more intimate, such as level promotion, connection exchange, carrying items carried by evolution and connection exchange, carrying specific props, level promotion and exchange with specific treasures.

Baidu Encyclopedia-Sweet Firefly