Ampharos

Ampharos is an Electric-type Pokemon that first appeared in the second generation games, Gold/Silver/Crystal. It evolves from Flaaffy at Level 30, which in-turn evolved from Mareep at Level 15. The Pokedex classifies it as the Lighthouse Pokemon, which has often been portrayed in various media: In Pokemon Gold, Silver and Crystal, an Ampharos lights-up the Olivine City lighthouse.
From X/Y onwards, an Ampharos holding the "Ampharosite" item can mega evolve into Mega Ampharos, which is an Electric/Dragon type with extra points mostly going into its Special Attack stat. However it does lose 10 points of speed.