I unlocked the credits myself by completing the 25 exercises on the EU version (I have only checked the Starter Edition)
EUROPEAN VERSION STAFF
Directors
Takaya Yamane
Koichi Kishi
Coordination
Shinya Fujiwara
Design
Hiroyuki Tashiro
Hiromi Tanaka
Programming
Yuki Tsuji
Sound Effect & Programming
Masanobu Matsunaga
Shoh Murakami
Technical Support
Yoshito Yasuda
Debug
NOA Product Testing
Progress Management
Kenji Nakajima
Osamu Yamauchi
Voices
Steven Ashton
Kimberly Forsythe
Emma Howard
Michael Rhys
Rachel Smith
Daniel Yamamoto
Voice Editing
BRAIN'S GEAR, Inc.
English Text Writing
Bilingual Publishing Inc.
Kristin Armitage
Rod Walters
English Text Editing
Masaaki Hashimoto
English Text Coordination
Yukari Ohno
Yuri Takamine
EUROPEAN LOCALISATION
Localisation Management
Erkan Kasap
Paul Logue
Localisation Producers
Sibylle Steinau
Alex Meng
English Translation
Rob Kingswell
German Translation
Susanne Becker
René Paulesich
Italian Translation
Maurizio Minunni
Christian Massi
Spanish Translation
Miguel Sánchez
Francisco Paredes
French Translation
Flavie Mathieu
Grégory Moreau
NOE Quality Assurance Coordination
Steffen Lotz
Amaury Bagnariol
NOE QA TEAM
Special Thanks
NOE Artwork Team
DSignR mediadesign
Tsutomu Kitanishi
Very Special Thanks
PLATO CORPORATION
JAPANESE VERSION STAFF
Director
Toshiaki Suzuki
Program Director
Yuichiro Ito
Assistant Director
Kenta Kubo
Design
Chiaki Aida
Kaori Mishima
Hideo Hatayama
Program
Yuichiro Ito
Nobutaka Torigoe
Sound Effect & Program
Tomokazu Abe
Music
Daisuke Shiiba
Artwork
Takanao Kondo
Harumi Mochizuki
Technical Support
Yoshito Yasuda
Debug
Naofumi Terazono
Yukiko Miyamoto
Super Mario Club
Coordination
Shoichi Nomura
Design Advisors
Tadashi Matsushita
Yusuke Nakano
Special Thanks
Kouichi Kawamoto
Noriko Kitamura
Masaki Tawara
Norihide Sasaki
Ryan Harris
All SPD STAFF
Very Special Thanks
PLATO CORPORATION
Voices
Bianca Allen
Kimberly Forsythe
Eric Kelso
Jeff Manning
Voice Editing
BRAIN'S GEAR, Inc.
English Text Writing
Bilingual Publishing Inc.
Masami Goda
Kevin Martin
English Text Editing
Masaaki Hashimoto
English Text Coordination
Yukari Ohno
Yuri Takamine
Supervisors
Kosuke Asakura
Eriko Kitahara
Progress Management
Masaru Nishita
Producer
Shinya Takahashi
Executive Producer
Satoru Iwata