N64 Promo Mario Bros. V1.2

• Sprites are completely rerendered with new poses, better shading, and higher resolution.
• Gloat voice clips had their echo adjusted.
• Luigi's voice clips were adjusted.

Here's a minor update that changes a few things to give it some more polish.

• Luigi's joke signpost sprite was updated to make the reference clearer.
• Some of Mario and Luigi's voiceclips were changed.
• Mario and Luigi's custom colors have changed invcolors and were made accessible to prevent synch failures.
• Pain sprites are updated to look less awkward.