I haven't tried this without the ROM being trimmed yet but it has locked up on me twice (black screen) on two different bosses where I would get a black screen. I used SkinnyROM to trim. I played the Japanese version (finished 100% of DK levels) and it never locked on me. I bypassed the movie portion by pressing the start button the next time. Hmmm now that I think about it, for most of the talking sequences I would hit the start button on the Japanese version since I didn't know what dialogue was being said anyhow.
Anyone else having a similar problem?