. . . .Am I allowed to post mixes I made with Music Maker Deluxe Edition for Playstation 2 on Soundcloud? . . .
That depends on what you are actually doing -
if you are remixing sounds/music from PS2 games - NO - you are breaking the games copyright conditions.
If you are creating sound tracks to accompany screen capture from PS 2 and used the Soundpools in MMM and have not purchased the Pro licences for the Soum]ndpools used - NO - you are breaking the Terms and Conditions of MMM.
If you have used the Synthesizers in MMM and composed your own tunes and / or have purchased the Pro icences for any Soundpools used - Yes,