Fond of mischief; mischievous — describes a person or animal that likes pranks or playful troublemaking.
子どもはみんな少しはいたずら好きだ。
All children are a bit mischievous.
彼はいたずら好きで、よく友達に冗談を言う。
He's mischievous and often jokes around with his friends.
その猫はいたずら好きで、夜に棚の物を落とすことがある。
The cat is mischievous and sometimes knocks things off the shelf at night.