Game is in black and white and questions about Media Engine

[Ricket]

I was playing Patapon 2 and everything seems generally fine except that the whole game is in black and white (or greyscale?). And of course I know the game isn't supposed to be like that. I can't see the speech bubbles too, because they're either entirely black or white.

I'm new to this emulator and I've heard a lot about Media Engine solving problems, so what is this thing and how do I use it? I've googled and installed whatever I've found.

Whenever I enable Media Engine and SonicStage, I would be unable to load the game. I'm using build 2054 and the 64 bit version because the other version never manages to run.

Would someone be so kind as to explain to me, especially about the Media Engine part? Thanks in advance.