No Export for You: Piposaru 2001, Million Monkeys, Piposaru Racer, and SaruSaru Big Mission were the only titles in the series to not get an English release. An Eyetoy entry in the series, Monkey Mania, never got an American release due to poor reception in Japan, Europe, and Australia. Ape Academy 2 similarly only got released in Europe and Japan. In an odd case, Pumped and Primed was not released in Europe.
Also the anime series, Saru Getchu -On Air-, has been out for in Japan for 4 years with no sign of an English release.
The Playstation Move reboot is available in America...but if you want a physical copy, you have to get it from Japan or Europe, because the American release is download-only. Same goes for Ape Quest, except Europe didn't get a physical version.