Tekken Dark Resurrection

[supaman]

Wew the game is running at full speed in practice mode on my nexus 4, (with frame skip on although its hardly noticeable) but there is a major decrease in other modes. Some maps give me 40+ fps some around 30-35; also I get a black screen ocassionally and always when I am battling jimpachi, is this fixable? BTW I haven't encountered any missing faces bugs.