The Dub (American/Canadian Version)
*collective scream*

Digimon has a history of good dubbing. Season 1 kept most of the Japanese names. Season 2 had good voice actors. Many of the normal dub jokes were left out of season 3. Now for Frontier...

Names: Well, the names were not done well!
Takuya - Takuya (pronounced different)
Kouji - Koji (pronounciation issues)
Tomoki - Tommy (some resemblance)
Izumi - Zoe (WTF!?)
Junpei - J.P. (I get this one)
Kouichi - unknown (Please make it good. I BEG you!!)

Digimon Names: *banshee scream*
Agnimon - Agunimon (Agoooooooooooooooonimon!)
Wolfmon - Lobomon (Lobo is Spanish for wolf)
Chakmon - Kumamon (There's already a Kumamon [Bearmon]!)
Fairymon - Kazemon (WHAT'S WRONG WITH FAIRYMON!?!?! Kaze is Japanese for wind)
Blitzmon - Beetlemon (We KNOW what a blitz is! Beetle is just for those little kiddies.)
Vritramon - BurningGreymon (*sob*)
Garmmon - KendoGarurumon (BladeGarurumon is better, even for a dub name!)
Blizzarmon - KorIkkakumon (Call a Waaaaaaambulance)
Shutumon - Zephyrmon (My personal fav of the B-Spirit names, it ACTUALLY MAKES SENSE!)
Bolgmon - MetalKabuterimon (I can see Tentomon fans thinking this is another evolution of it. It's too close to MegaKabuterimon!)

Grottomon - Grumblemon (ARGH!)
Ranamon - Lanamon (ARRRRRRRGH!)
Arbormon - Arbormon (YAY! Although I dislike the character)
Mercuremon - Mercurymon (SHINE AQUA ILLUSION! Hehe.)
Duskmon - Duskmon (This is GOOD!)
Gigasmon - Gigasmon (^^)
Calmaramon - Calmaramon (double ^^)
Petaldramon - Petaldramon (although I've heard Leafdramon...)
Sefirotmon - Sephirothmon (FF7 anybody?)
Velgmon - Velgmon (Possibly, not sure)

Other
Attacks: The attacks of the Digimon...
Agnimon -
Japanese: Burning Salamander, Salamander Break, Fire Darts
Dub: Pyro Tornado, Pyro Darts
Wolfmon -
J: Licht Sieger, Strahl, Licht Kugel, Zwei Sieger
D: Lobo Kendo (ACK!)
Chakmon
J: Snow Bomber, Ice Pillar La La La, Frozen Cotton
D: Crystal Freeze, Frozen Tundra
Fairymon -
J: Tornado Gamba, Brezza Petalo, Doppio Perforare, Arido Anca
D: unknown
Blitzmon -
J: Thor Hammer, Lightning Blitz, Lightning Topper, Mjolnir Thunder
D: unknown
Vritramon -
J: Corona Blaster, Flame Storm
D: unknown
Garmmon -
J: Speed Star, Solar Laser
D: unknown
Blizzarmon -
J: Avalanche Step, Gletscher Torpedo
D: unknown
Shutumon -
J: Gigamesh Slicer. Wind of Pain
D: unknown
Bolgmon -
J: Thor Hammer, Ultimate Thunder, Field Destroyer
D: unknown