No, Rouge and Knuckles have never kissed in any "Sonic the Hedgehog" media as of 2014. However, there have been hints in games and televisions series that the two may really like each other.
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They only kiss in fan art
only in [knuckle and rouge kissing]
knuckles of course
Rouge likes Knuckles but Knuckles doesn't really like Rouge much, he thinks she is pretty annoying cause she hangs around Knuckles so much
no.....actuly they do they fell in love after kissing but they ariganly fell into each other