Dragon Ball Z: Attack of the Saiyans, known in Japan as Dragon Ball Kai: Saiya-jin Raishū (ドラゴンボール改 サイヤ人来襲), is a turn-based RPG video game based on the Dragon Ball franchise for the Nintendo DS. It was released in Japan on April 29, 2009, and in Europe, Austalia and North America in November 2009. The game is developed by Monolith Soft and distributed by Namco Bandai in North America and, everywhere else, under the Bandai label.
The game adapts events from the "23rd Tenkaichi Budokai" story arc to the eponymous "Saiyan" arc of the original manga. Despite the game's Japanese and Western titles, the former arc wasn't adapted into either the 1989 Dragon Ball Z anime series nor its revised version, Dragon Ball Kai (which also premiered in 2009), but instead comes from the original Dragon Ball anime/manga series.
Source: Wikipedia, "Dragon Ball Z: Attack of the Saiyans", available under the CC-BY-SA License.