Not sure if you can count a collection as an exclusive since MPT and the Kirby Collection are older games already released on other consoles excluding MP3.
Are they on XBox or PS systems? Nope.
Is the Wii multiple nintendo systems or just one different system? This is exclusive by consoles not Nintendo family but I get what your saying. The argument would hold more weight if the ports had significant exclusive features.
If I understand you correctly, are you asking if the Wii versions of multiplatform titles unique in any way? If so, the answer is usually a depressing "yes" because they have elements cut out. However, every now and then they have some unique added feature. Star Wars: The Force Unleashed on the Wii had an exclusive fighting mode, and one or two of the Call of Duty games has rail-gun set-ups for part of them.
