Whoa, weird. I tried them now and super family tennis, sugoi hebereke and super back to the future works. The only difference this time is that I explicitly started each game from the commandline while in the earlier tests I used the built-in file manager to select various games in succession. Tetris Battle Gaiden still turns black if you wait for the demonstration sequence (which shows gameplay) though (both in bobz version and in 0.136).
Also tried Dokapon Gaiden - Honoo no Audition which gives black screen (both bobz and 0.136)
I will make some more tests with a new build tomorrow.
