Buneary doesn't evolve through leveling. Instead, you have to raise its happiness level.
You can raise a pokemon's happiness by walking around, battling a gym leader or elite four with it, leveling it, using vitamins on it, or giving it a message/grooming it.
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Beneary evolves into Lopunny when it reaches a certain level of Happiness. To raise Happiness you have to make it fight a lot without fainting and give it his favorite poffins.
Luxio evolves into a Luxray at level 30.
Pokemon Pearl/Diamond Starly evolves into Starvia at level 13 and then evolves into Staraptor at level 34. Source(s): Experience from Pokemon Diamond
It evolves at level 40.
it evolves in to prinplup a level 16