that's not supported games, rather games that has cheats on their system I think. The codes they have on their website are minimal and you have to use the "Advance" option to use more customized codes. You can add games that's not on the list if it's anything like their previous save editors
**Looks like i am thinking about CODE EDITOR, which is a different product. SAVE EDITOR is prelisted games only with advance mode, sorry!
****REEDIT
上級者向けの“アドバンスモード”では、パッチコードが配信されていないタイトルでも、自分でセーブデータを編集することが可能です。バリバリ編集したいユーザーにおすすめのモードです。
that's on the webpage, which translates to "In Advancemode - you can add patch codes titles are are not on yet - you can edit save data yourself"