Any tips/tricks to reduce slowdowns when playing a cinematic on SMS?

I was playing Super Mario Sunshine since it´s one of my favorite games, and had lots of time without using it. I noticed that the introduction cinematic is slower compared to in-game ones (except for when any character talks). Every time a character talks, the speed goes down.

I saw somewhere in the forums a trick to solve this (or helps a bit to solve it), but I can´t remember well how it was... If anyone has any idea about this, please let me know.

I was using both 3.0 and 4.0.2, BTW.