How many levels of Noibat evolution?

How many levels of Noibat evolution? To evolve into a Sonic dragon, a drone needs to reach level 48, after which it can evolve. There are no other requirements that limit the ability to acquire a Drone to the eastern shore of Toothtooth Lake, where the giant Battle takes place. Buzz (level 15 to 20) can be caught opposite the engine entrance at levels 5 to 47 (initial form) and above 48 (final form, automatically evolve upon reaching level)
 

The Noibat resembles a purple bat with bat-like wings and sensitive ears, but it has reptilian features. The ears are larger than the head and have multiple layers, with prominent patterns in the middle of the eye.



Noibat lives in a dark cave and likes to eat fruit. When the sun sets, it leaves its cave and flies around, shooting 200,000-megahertz ultrasounds from its large ears in search of ripe fruit. It can control all frequencies of sound, hits fruit with ultrasonic waves, and then selects only ripe ones to eat. It's a gourmet. If caught by a 200,000-megahertz ultrasound, even a strong wrestler would be too dazed to stand. Even the giant Pokemon can't do anything about its ultrasound.