Two things.
1. I wish it came out in the U.S., too, and with an English translation.
2. If Mother 3 had voice acting, here's who I'd pick:
Dylan Sprouse - Lucas/Claus (voice)
Cole Sprouse - Claus/Lucas (voice)
Jeff Bennett - Flint (voice)
Jennifer Hale - Hinawa/Additional Voices (voice)
Frank Welker - Boney/Salsa/Frosty Wolf/Weird Floating Desert Chimp/Additional Voices (voice)
Carlos Alazraqui - Duster/Additional Voices (voice)
Grey DeLisle - Kumatora/Additional Voices (voice)
Quinton Flynn - Ice Cream Vendor/Yammonster/Additional Voices (voice)
David Rasner - The Masked One (voice)
Tara Strong - Kangashark/Linda/Tessie/Additional Voices (voice)
Fred Tatasciore - Wes (voice)
Dave Wittenberg - Alec/The Magypsies 1, 2, 3 (voice)
John Di Maggio - The Magypsies 4, 5, 6 (voice)
Crispin Freeman - Isaac the Lumberjack (voice)
Susan Silo - Osohe Cape/Additional Voices (voice)
Mark Hamill - Short Circuit Crash/Additional Voices (voice)
Maurice LaMarche - Yokuba/Snowboarding Yeti (voice)
Brianne Siddall - Little kid trapped in burning house (voice)
Dee Bradley Baker - Deceitful Door/Carpet Monster/Titany/Mouse Enemies (voice)
Paul Eiding - Mecha-Drago/Ultimate Chimera (voice)
Robin Atkin Downes - Mr. Passion (voice)
Scott McNeil - DCMC Bouncers (voice)
Meh, just a thought.
I have the same birthday as Johanna E. Braddy (Princess Yue on Avatar.)