News comes from Degneki PlayStation and it sounds like another port of Phantom Brave.
There’s chatter about Phantom Brave Portable on message boards and a few blogs. Unfortunately, scans haven’t leaked so there aren’t any details about Phantom Brave Portable at this time.
Our guess (while searching for scans) is this is another version of Phantom Brave. That’s based on the name alone, though so take it with a grain of salt.