Ampharos is a yellow, bipedal ovine Pokémon with a white belly. It has conical ears with black stripes and a red orb on its forehead. Its long neck has several black rings around it near the base. Its stubby arms resemble flippers and each foot has a single white nail. It has a long, black-striped tail with a red orb at the tip. The orb on its tail can shine so bright, that it can be seen from space. People have used the light as a beacon, or to send signals across the ocean. Ampharos is generally found in grasslands, though it can also be found in farms alongside its pre-evolved forms Mareep and Flaaffy. As mentioned in Pokémon Sleep, the tail light of a sleeping Ampharos can sometimes seen in the distance at night. This is due to Ampharos forgetting to turn its tail light off before going to sleep.

Forms
Ampharos can Mega Evolve into Mega Ampharos.

As Mega Ampharos, its toes turn black and it regrows white wool at the back of its head and over its tail, having its genes stimulated by Mega Evolution. This energy also awakens its long-dormant dragon blood. Its long wooly tail has many small, red orbs attached to it. Its conical ears retain their stripes but are now segmented with swirled tips. When it increases the amount of electrical energy within itself, the red orbs on its body and wool emit a strong light. Mega Ampharos can generate an electric barrier for defense, shocking anyone caught within it. Additionally, it can create electric spots on the ground that, along with lightning attacks, release orbs that explode over time.

Evolution
Ampharos evolves from Flaaffy and is the final form of Mareep.

(Source: Bulbapedia)