No. That is either a demo, a corrupt file, or a trimmed CSO (compressed ISO) missing the voice acting and cutscenes. Look for the full 1.2 GB repack.
If you previously played the Japanese version, your save file might not immediately load on the English patched version due to ID changes. You may need a save game converter or hex editor to alter the Game ID of your save file to match the modified English ISO. To help optimize your setup, tell me: danball senki w psp iso download repack english patch