Wargle? What's that?
And about GenI-IV legendaries, what about the weather trio? I've heard they're based off the Jewish holy text.
Wargle is the japanese name for Braviary, I think.
All the regions have a lot of eastern influences, its just they seem to be far more obscure then the other ones, so you're not likely to notice unless you trawl through bulbapedia.
As for Unova, while the region itself is certainly meant to be more western, the generation seems to be the same eclectic mix as always. And do keep in mind the series is made by the japanese and marketed to them first and foremost, and they can be just as guilty of projecting their culture as we westerners are, hence the very japanesey Abundance shrine.
Edit: Actually, I'm going to trawl through bulbapedia again and make a list of what cultures the legends are seemingly based off.
Articuno - Roc (Middle Eastern): A really big white bird
Zapdos - Thunderbird (Native American) : A giant bird associated with storms
Moltres - Phoenix (Various, but Moltres is closer to western depictions)/ Firebird (Slavic)
Mewtwo - Based more on sci-fi concepts then myths. Possibly some influence from the greys, a popular depiction of aliens.
Mew - Based off science theories, not myths
Kanto's influences are all over the place it seems.
Raikou - Raijin (Eastern) : A thunder creature depicted as various different animals. Raikou is based off its depiction as a tiger, Manectric its depicting as a wolf.
Entei - Imperial Guardian Lions (Chinese) : Stone statues of very stylised lions. Frequently mistaken for dogs by westerners.
Suicune - Quilin (Eastern) : A wierd mythical creature that is a mix of a ton of different animals, such as dragons, oxes, lions, deers, etc. Similar to unicorns.
Lugia - Ryukin (Eastern) : A dragon that lives under the sea, symbolises the ocean.
Ho-oh - Chinese Phoenix
Celebi - Fairy/Dryad (Greek)/Kodoma (Japanese) : It's kinda hard to tell really, but the last one certainly fits in with the other gen 2 legends.
Johto - Very very eastern. Lots of references to Shintoism.
Regis - Golems (Hebrew) : Pokemon has a ton of golems, yet the one actually called Golem is not one. Wierd, huh?
Latis - Vaguely reminiscant of yin/yang, possibly based off Aeons (Gnosticism) Immaterial-concepty-being things that always come in Male and Female pairs.
Groudon - Based off the Behemoth (Hebrew), but looks nothing like it (It's some sort of hippo thing). Visual appearance might be from Dinosaurs, or Godzilla.
Kyogre - Based off the Leviathan (Hebrew), but only sort of visually (They were sea serpents, but leviathan can mean whale in modern languages)
Rayquaza - " Ziz (Hebrew) " " " The ziz is a bird, so Rayquaza might also be based off Eastern Dragons, or the Quetzalcoatl (Ancient American?).
Jirachi - Various wishing myths. The tags are an eastern thing, but it might also be based off Genies (Islamic?)
Deoxys - Aliens/DNA. More Sci-fi then mythical.
Hoenn - All very middle easterny. Except for Deoxys. Don't know what he's doing here.
Lake trio - Pixie (British) / Sprite (Various) / Gnome (Or Elf) (European) : Their appearance and names are all from small tricky humanoid creatures, but they represent the three scared treasures of japan.
Dialga/Palkia - Spear Pillar is based off the Shinto legend of Izanami and Izanagi, who are said to have created one island with a spear, erected a pillar on it, and from there created the islands of Japan. Otherwise they just seem to be timespace dinosaurs, because why not.
Giratina - Visually, its based off the Basilisk (European) and the Amphiptere (American). Mythwise Bulbapedia doesn't know.
Arceus - Again, more Shinto legendy stuff, its based off Kunitokotachi and Amenominakanushi (thank you copy and paste) who summon the guys dialga and palkia are based off. Visually its another Quilin maybe? Otherwise, its based off Creator Deities, which are basically everywhere in mythology.
ok bored now. look up the rest on your own. ive no idea why i even typed all this