If switching Moonshell themes is a painful trial and error process for you, Kloplop321's theme emulator called Phleon can help make life easier. As you would've guessed, it partly emulates Moonshell on the PC so you can find out how compatible certain files are with the Nintendo DS multimedia player.

According to the developer, Phleon is a VB.NET program and can go in reduced mode to run more efficiently on less powerful machines. Phleon is still in its beta stage, and Kloplop321 doesn't want to release the source code before a major version. For now, you can at least count on it to show how Moonshell would to react to various files you want to use in your themes.

For more details, or if you want to send in suggestions, check out Phleon's official website for Kloplop321's contact information and future updates.