E has updated the Wonderswan Emulator for the PSP, heres a rough :P translation:
It meaning kind of that グラフィクス processing is slow, it is in the midst of improving.
It has reached the point where is not sound.
Mounting still still being to be, the possibility where it cannot be satisfied with speed is high, is.
Please stop also the fact that complaint you say.
However always it seeks concerning the information regarding the WonderSwan.