The ponies' countries are based on the similarity between looks/personalities compared to the country's respective cultures, their economies or current situations, relations between countries, their histories, size compared to importance, or are just randomly thrown in.

No offence intended.

Here's the list:
Afghanistan — Diamond Tiara
Albania — Night Glider
Algeria — Sapphire Shores
Andorra — North Pole
Angola — Shining Armor
Argentina — Button Mash
Armenia — Thunderlane
Australia — Braeburn
Austria — Octavia Melody
Azerbaijan — Flitter
Bahamas — Winona
Bahrain — Doctor Horse
Bangladesh — Apple Bottom
Barbados — Tropical Spring
Belarus — Silver Shill
Belgium — Mr. Cake
Belize — Nightjar
Benin — Sonata Dusk
Bhutan — Wild Fire
Bolivia — Royal Guard
Bosnia and Herzegovina — Whiplash
Botswana — Sew n' Sow
Brazil — Pinkie Pie
Brunei — Stinkin' Rich
Bulgaria — Snips
Burkina Faso — Rumble
Burundi — Crystal Arrow
Cambodia — Sunset Shimmer
Cameroon — Mulia Mild
Canada — Big MacIntosh
Central African Republic — Igneous Rock
Chad — Limestone Pie
Chile — Starry Eye
China — Twilight Sparkle
Colombia — Sheriff Silverstar
Congo — Flurry
Congo (Zaire) — Soot Stain
Costa Rica — Cheese Sandwich
Cote de Ivore — Chocolate Sun
Croatia — Berry Punch
Cuba — Party Favor
Cyprus — Sunshower
Czech Republic — Apple Strudel
Denmark — Maud Pie
Djibouti — Stellar Eclipse
Dominican Republic — Junebug
East Timor — Pumpkin Pie
Ecuador — Tank
Egypt — Babs Seed
El Salvador — Zipporwhill
Equatoral Guinea — Bags Valet
Eritrea — Featherweight
Estonia — Diamond Mint
Ethiopia — Cloud Quartz
Fiji — Lucy Packard
Finland — Cheerilee
France — Rarity
Gabon — Mane Goodall
Gambia — Cranky Doodle Donkey
Georgia — Cloudchaser
Germany — Photo Finish
Ghana — Adagio Dazzle
Greece — Fancy Pants
Guatemala — Ms. Peachbottom
Guinea — Hayseed Turnip Truck
Guinea Bissau — Sassaflash
Guayana — Cherry Jubilee
Haiti — Sightseer
Honduras — Caramel Apples
Hong Kong — Spike
Hungary — Apreggio
Iceland — Mayor Mare
India — Scootaloo
Indonesia — Daring Do
Iran — Flim
Iraq — Flam
Ireland — Time Keeper
Israel — Applebloom
Italy — Sweetie Belle
Jamaica — Tree Hugger
Japan — Rainbow Dash
Jordan — Dinky Doo
Kazakhstan — Pipsqueak
Kenya — Zecora
Kosovo — Coco Pummel
Kuwait — Pearly White
Kyrgyzstan — Manerick
Laos — Score
Latvia — Dolphin Dream
Lebanon — Dumbbell
Lesotho — Derpy Hooves
Liberia — Apple Cider
Libya — Discord
Liechtenstein — Double Diamond
Lithuania — Lyra
Luxembroug — Donut Joe
Macedonia — Sugar Belle
Madagascar — Apple Leafs
Malawi — Riverdance
Malaysia — Gilda
Maldives — Skyra
Mali — Cherry Berry
Malta — Screwball
Mauritania — Kyrippos II
Mexico — Apple Fritter
Micronesia — Rainy Feather
Moldovia — Neon Lights
Monaco — Hoity Toity
Mongolia — Flash Sentry
Montenegro — Sunshower Raindrops
Morocco — Starswirl the Bearded
Mozambique — Diamond Dogs
Myanmar — Lily
Namibia — Bulk Biceps
Nauru — Owlowiscious
Nepal — Lucky Clover
The Netherlands — Granny Smith
New Zealand — Little Strongheart
Nicaragua — Caramel
Niger — Marble Pie
Nigeria — Surprise
North Korea — Trixie
Norway — Aloe
Oman — Queen Chrysalis
Pakistan — Silver Spoon
Panama — Roseluck
Papua New Guinea — Wheat Grass
Paraguay — Amethyst Star
Peru — Trouble Shoes
The Phillipines — Red Gala
Poland — Bon Bon
Portugal — Fleur dis Lee
Qatar — Filthy Rich
Romania — Snails
Russia — Luna
Rwanda — Angel Bunny
Samoa — Rivet
San Marino — Mr. Waddle
Saudi Arabia — Haakim
Senegal — Matilda
Serbia — Suri Polomare
Sierra Leone — Manticore
Singapore — Iron Will
Slovakia — Mrs. Cake
Slovenia — Minuette
Somalia — Hoops
South Africa — Cadence
South Korea — Vinyl Scratch
South Sudan — Pound Cake
Spain — Prince Blueblood
Sri Lanka — Tealove
Sudan — Blue Nile
Suriname — Truffle
Swaziland — Red June
Sweden — Lotus Blossom
Switzerland — Nurse Redheart
Syria — Trenderhoof
Taiwan — Starlight Glimmer
Tajikistan — Fluffy Puff
Tanzania — Amber Waves
Thailand — Soarin'
Togo — Aria Blaze
Tonga — Sweet Pop
Tunisia — Opalescense
Turkey — Twist
Turkmenistan — Cream Puff
Uganda — Gummy
Ukraine — Golden Harvest
United Arab Emirates — Amira
United Kingdom — Celestia
United States — Applejack
Uruguay — Ms. Harshwhinny
Uzbekistan — Dry Wheat
Vatican City — Fluttershy
Venezuela — Banana Fluff
Vietnam — Spitfire
Western Sahara — Lightning Dust
Yemen — King Sombra
Zambia — Esmerelda
Zimbabwe — Pokey Oaks