Which games allow or require you to hold your DS system sideways like a book?

I've got a problem.

OK, so I've got lots of problems--especially when it comes to this lovely little hobby of mine that some folks refer to as "gaming."

Only one of those problems is relevant to this particular blog post, though, and that would be that I'm currently kind of obsessed with games that allow or even require you to hold your DS system sideways (like a book) while playing them.

The thing is, I can't think of many DS games that fit this description. Obviously Hotel Dusk is one of them, as is its sequel, Last Window.

Aside from that wonderful pair of visual novels, though, the only examples that come to mind are Square Enix's intriguing Sigma Harmonics, Rhythm Tengoku Gold (Rhythm Heaven in North America and Rhythm Paradise in Europe) and the Brain Age games.

Do you fine folks know of any other DS carts that let or force people to play them "book-style"? If so, I'd really appreciate it if you'd share their names in the comments section below.

See also: 'Nice Package! (Last Window: The Secret of Cape West, Nintendo DS)'