Face Raiders is a game where you take pictures of people and their faces become evil or somthing and try to attack you, One of the faces kiss you.
https://www.youtube.com/watch?v=jBWsiaTvVQ4&feature=related
16:10 and I tried to find a better one but this was the only one where it showed the kiss.
This game is too weird to explain well so i'll just let this do the explaining,
http://nintendo3ds.wikia.com/wiki/Face_Raiders
Oh, and when you beat a boss, they look like this: