Wii port - Mortal Kombat 4 GBC audio and video glitches

[SieKensou]

I tested this game today and I noticed that it makes weird noises when a sound effect or voice plays. The game also have some graphical flashing in the backgrounds when you are playing that shouldn't happen. Also a weird 2 squares appear to each side of the time counter and a bar at the bottom of it (the color changes according with the stage is being played or maybe the characters, I'm not sure, but that garbage shouldn't appear, it would bu just black...).