Personally, I think the more players of a of a game there are, the better the games get. I'm 13 and my older sister is 18 and she bought both games, while I only have Black. And I get made fun of for playing the games, but do you really think I care. I've been playing the games for about... 6-7 years, andn I was stuck with Emerald for 4 years, as I didn't buy a DS till the DSi came out and my dad had gotten me Platinum for Christmas. So no, an adult playing Pokemon is acceptable, as Pokemon has some stuff that appeals to college students. Actually, the biggest targets for Pokemon are elementary school kids and college students. 90% of this site is inhabited by them.