Elminage: Yami no Miko to Kamigami no Yubiwa (PlayStation 2)

Elminage: Yami no Miko to Kamigami no Yubiwa
Developers: Starfish, Opera House Publisher: Starfish Platform: PlayStation 2 Released in JP: March 27, 2008 This game has debugging material. This game has a hidden sound test. This game has a hidden level select.

Debug Menu

Enabling the below code will send you to this screen after the Press Start Button screen.

Master Code (only needed for cheat devices)
90123E90 0C048F4C

Debug Menu After Press Start Screen
001817A0 00000000

Text	Translation
1.バトルテスト	Battle Test
2.ダンジョンテスト	Dungeon Test
3.キャラ画像ビュー	Character Image Viewer
4.サウンドテスト	Sound Test
5.最初から（メモリーカードチェック＆オートロードから）	From the beginning (From memory card check & auto load)
6.バトルテスト２	Battle Test 2
7.宝箱テスト	Treasure Chest Test
8.ムービーテスト	Movie Test
9.デバッグ用SW	For Debug SW
10.デバッグCHR	Debug CHR
11.乱数テスト	Random Number Test

The last three options don't appear to work.

(Source: Punk7890)