Advance Wars: Dual Strike, known as Famicom Wars DS in Japan, is a turn-based strategy video game developed by Intelligent Systems and published by Nintendo for the Nintendo DS handheld game console. It is the third installment in the Advance Wars series (the first on the DS) and was released in 2005 for Japan on June 23, in North America on August 22, in Europe on September 30 and in Australia on March 22, 2006.

The storyline is a continuation of the previous two games and is set in the new location of Omega Land. Black Hole has returned under the leadership of a new commander who seeks to give himself eternal life by draining the energy of Omega Land. The Allied Nations struggle to overcome this threat and are eventually joined by several former Black Hole commanding officers in an effort to save the land.

Advance Wars: Dual Strike received "universal acclaim" and also won several awards, including "Best Strategy Game for the DS" from IGN in 2005. It sold more than 35,000 copies in its first ten weeks in Japan. It was followed by a sequel, Advance Wars: Days of Ruin.

The player's objective in Dual Strike is to defeat the enemy army with their own army. Except in some campaign missions with special objectives, there are two ways to defeat an opponent: destroy all of the enemy's units or capture their headquarters. The battle system is turn-based tactics. Two to four armies, each headed by one or two commanding officers (COs), take turns building and commanding units on grid-based maps. Every turn, units, which consist of ground, sea and air units, can move across the different types of terrain and attack enemy units or perform other actions, such as submerging a submarine or resupplying friendly units. Many factors can affect the battle, such as fog of war, a phenomenon that prevents players from seeing enemy units other than those in the visual range of their units; various weather conditions which change the terrain effects of the entire map; and CO powers.^{[unreliable source]}

All of the COs from the previous two games in the series, aside from Sturm, return in Dual Strike. In addition, nine new COs make an appearance; two for Orange Star, one each for Blue Moon, Yellow Comet, and Green Earth, and four for Black Hole, resulting in a total of 27 COs.

The namesake of Dual Strike is the ability to use two COs in a battle to command a single army. By using two COs, the weaknesses of each CO can effectively be covered by switching COs mid-battle. In addition, when using two COs, a new CO power named "Tag Power" or "Dual Strike" can be used. It allows players to use both COs' Super CO powers consecutively in the same turn, and effectively allows the player to have two turns.

Finally, COs in Dual Strike gain experience and can be promoted after each victorious battle in the War Room or Campaign. Higher ranked COs have access to different skills to tune and enhance their fighting styles. Abilities vary in type and benefit; some improve attack or defense, others increase the benefits of certain units or terrain types, while others affect the player's money flow. The star ranked skills must be unlocked by completing the Campaign modes. Each CO can use a maximum of four skills at once. Abilities can be changed around as many times as needed, but cannot be changed during a mission.

The DS's two screens provide new ways of presenting a round of battle in Dual Strike. The bottom screen is where the main battle takes place, while the top screen is used to display the terrain and unit intelligence. However, in some missions, the top screen shows a second front. The second front is a second battle that is waged simultaneously with the battle on the lower screen, which is integral to some missions. The player can change the top screen back to the intel screen and vice versa, and units in the first front can be sent to the second. Units sent to the second front cannot be sent back to the first front.