Play are selling "SpongeBob's Atlantis Squarepantis" for the Nintendo DS for £11.99 (inc Del.)
You can get cashback through the usual sites (e.g. 4% Quidco, making it just £11.51)
The next best price seems to be £13.99 from ChoicesUK.
Holy algae! SpongeBob and Patrick stumble upon the lost magical amulet that will take them to the legendary city of Atlantis. Players will join them and the rest of their Bikini Bottom pals as they ride on a magical bus for a soaking new adventure. Hoping to uncover the treasures of Atlantis in order to fulfill SpongeBob's dream of finding the "World's Oldest Bubble," players will control whether the city brings everything he desires, or if Plankton's evil plan will burst his bubble.
- Relive the best moments from the TV episode
- Explore the lost city of Atlantis and meet new characters
- Play as six key characters from the show, including SpongeBob, Patrick, Sandy, Squidward, Mr. Krabs, and Plankton
- Replayable levels so players can beat their best score
- Exciting multiplayer minigames in the Amoeba Arcade
- Drive the Atlantean tank and fire ice cream at enemies
- Create music to power the magical bus to Atlantis
- Customise SpongeBob with new accessories, outfits and expressions
- Unlockable bonus features include:
...' Director's Commentary' featuring SpongeBob himself talking about being in the game!
... Additional variations of every level
... Extra arcade games