but in a sense of competitive battlers, are numbers are dwindling and the anime isn't helping.
Really now? And where are YOUR sources for making such a claim? As far as I can tell, the number of competitive battlers is higher than ever thanks to things like the GBU. They're just not all on our simulators anymore because its no longer the only way to do online competitive battling. The anime has and still is increasing the number of competitive battlers by increasing the number of people playing Pokemon. Plain and simple.
I don't see where you can get away with calling me down for not having sources beyond my experience and reason where yours are only based around experience yourself. Please, before you set up a straw man argument make sure you aren't setting yourself up as well.
Anyway, as for the claim that the anime mis-educates people about the series....
1) That doesn't count as a "reputation" it's a different problem
2) From what I've heard they've gotten MUCH better about that in recent years in the anime, and honestly, you learn more GOOD information than bad from the anime anyway.
3) And assuming that ANYONE who comes to competitive battling won't be ignorant of something big is a bit silly. Don't you remember how huge of a learning curve it was for YOU to get into this? And how many of those people are still, y'know kids? Of course they're going to think dumb crap, they don't know any better yet. The anime has nothing to do with it.
Anyway, my point is that it doesn't give a "bad reputation" to anyone that matters. Seriously, as IAR said, don't let some dumbass 15 year old tell you what you can and cannot play. If you're sooooo worried about being shunned in high school, just don't play it where they can see it or talk about it where they can hear it. And really, the opinion of anyone who judges you on something so incredibly shallow really shouldn't bother you, since they're making it abundantly clear THEY are the ones that haven't grown up. And in the long term what they think will mean absolutely nothing at all; once you get out of high school all that nonsense tends to evaporate pretty quickly.
So yes, maybe it does contribute to a bad reputation (but not by itself remember, the games are kid centric too)... but only among the people who should matter the very least in your life. They're behaving like children and their opinions on your interests should matter to you about as much as a child's would. To everyone else, no one cares, and the practical benefit the anime has are far to valuable to even consider dropping it to attempt to solve such a minor problem (and it wouldn't even solve the problem anyway).