Overall, the Wii games list isn't that big. At this time, it shouldn't be split. If I checked right: only a few platforms have been split into several lists: Amiga and Commodore 64. Take a look at List of PlayStation 2 games, it's over double the size of the Wii list, and I see no issues with size there. One thing the Wii list should have: section breaks for each letter, that would help editing.