If you manage to find a partial patch or want to play the Japanese ISO using the PPSSPP Emulator :

Standard Japanese ISOs for Danball Senki W are available on various ROM archival sites, but you will need to navigate them in Japanese. Technical Warnings

Some sites claim "100% English" for Danball Senki W, but these are often misleading or refer to the prequel, Danball Senki Boost

Downloading a PSP ISO file of Danball Senki W with an English patch offers several benefits, including: