Mario Party 3 DX is likely a community-created enhancement mod, "DX" often implying a definitive or enhanced edition. The mod likely includes improvements to graphics, gameplay mechanics, or other aspects of the original Mario Party 3, aiming for an enhanced overall experience. The original is a Nintendo game, while this is an expansion or improvement mod.

Mario Party 3 DX

Mario Party 3 - Game Guy Mod with Toad