So I finally moved the GCN and Wii games up to the loft, not really a handheld game room anymore, it's just its own thing. Decided to move Wii U up there too because why not. I'd consider moving my NES, SNES, and N64 games up there and just make it a Nintendo area, but then the game room would be mostly empty because the NES, SNES, and N64 (nearly 1000 games) takes up almost half the room by itself. But I'll continue thinking about doing this.
Built a shelf strictly for GCN, Wii, and Wii U games, almost full, probably has room for another 20-ish games. Still need to bring up my Wiis and my Wii U. Might try to bring up all of the GCN, Wii, and Wii U accessories, but don't know where it would go, so it's not super important right now.
So I'm in the process of shifting stuff around to make room for when I get new stuff. But i'm also planning on printing out more cover art to put N64 games in UGC cases, so when that's done I will probably be out of room again.
Highly considering selling off tons of Genesis and Xbox games just to make room.