Lobo and Werelobo

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Lobo (Poochyena+Nuzleaf): They are constantly trying to take over other Pokemon's territory, mostly Houndours and Mightyenas. They never back away from a fight. They evolve into Werelobo using a Moon Stone.
 
Werelobo (Mightyena+Shiftry): They've grown a link to the moon, and most of their power comes out of it. They rarely fight at daytime, and will often use the cover of the darkness to ambush their prey. In the Pokemon world they're known as cowards for such a strategy.