The Game Collections are selling "Ultimate Mortal Kombat" for the Nintendo DS for £7.99 (inc Del).
The next best price seems to be £12.49 from Fusion Hobbies.
* First Mortal Kombat ever to appear on the Nintendo DS! * A faithful recreation of the original and highly successful arcade version of Ultimate Mortal Kombat 3 * Puzzle Kombat, the addictive and popular Mortal Kombat-style puzzle game from Mortal Kombat: Deception is includedand is playable online! * Three ways to play against a fellow Mortal Kombat combatant * Best of all, the Nintendo Wi-Fi Connection allow two players to battle against each other anywhere in the world via the Internet! * More than 20 playable Mortal Kombat characters and 15+ arenas will keep gamers involved in the fight! * Classic finishing moves: Fatalities, Babalities, Friendships, Animalities and Stage Fatalities will give the player the chance to execute some of the most creative moves of the series.