Something interesting that quite rare is the way that Nana and Lulu speak in Shugo Chara!! Doki!... Nana especially has a thick Nagoyan accent.
Osaka-ben and Kansai-ben are not uncommon in anime, but Nagoya-ben is something I've never heard before Shugo Chara.
It's actually quite strange sounding, very distinct. Everything ends with a "ya" or an "dagya" or a "gane!"
http://en.wikipedia.org/wiki/Nagoya_dialect
Anyway, pretty much the only Nagoya-ben that's ever heard in real life outside of Nagoya is someone proclaiming "Umya!!" after eating some delicious ramen. (It's Nagoya-ben of "Umai!").