This game has a banner directory (like many other DS games) which contains a banner and a set of plain text files for different languages, each containing a short description of the game's multiplayer mode, to be displayed on the receiving system when Download Play is used.
Interestingly, it has a Chinese version file, "dlexpl_ch.txt", despite this particular game never being distributed there. This file seems to contain an early version of the Japanese text instead.
Text from "Chinese" file (dlexpl_ch.txt)
Final Japanese text (dlexpl_jp.txt)
どんきーDS
たいせんで アツくなれ
ライバルたちをぶっちぎれ
ドンキーコング ジャングルクライマー
ノンストップ レースバトル!
さいそくは だれだ!
Translation:
Donkey DS
Blaze in Battle!
Beat out your rivals!
(Source: Translation: GlitterBerri)
Translation:
Donkey Kong Jungle Climber
Nonstop race battle!
Who's the fastest?!