maybe thats the problem u have, they are not battling for pride, they dont even consider themselves as good battlers, they only want to hang out just a bit, they dont usually sign in on other tournaments as most of em are new players and know they dont stand a chance against others, when i signed in on their tournament they were like "meh, KP´s gonna win it" so i decided to use non battler pokemon as u can see in this list of the pokemon
http://prntscr.com/2d4z8h , didnt plan to win it at all but participate so if u just want to beat some guys just host a tournament (i know u already hosting one) or make some casual pvp battles, they are not wanting to show some kind of pride and their latin guild in fact does exist but is kinda new, and yeah latin guys has participated in guild wars in fact i won the last one with my "vengadores" guild (latin one), dude u dont have to feel that way u dont understand is nothing against others they just want to hang out a bit between em,
guild tournaments are made all the time in guild topics, maybe i should suggest em to make his own topic or make it via FB that way there wont be any more complains or...
if u want to beat latin guys, there are a few that could be a challenge, theres Matileo (Lance_DM), DeGeDF, wcce and myself, if u want to enter just to beat some new butts in the battle scene hmm then go to battle channel there are tons of em, so take it easy is not something racist or stuff like that ill tell em to stay out of ur sight if that suits u better