These editions were only released in Portugal and Spain I believe. I did not find them anywhere else, so I believe they will be rare in the future. They are nothing special, only the regular games with some bonus figures and such. But they look good and there aren't that many editions for the DS such as these so they are very nice collectibles.
The pictures are from Combat of Giants: Dragons with the golden dragon figure, Combat of Giants: Mutant Insects with the scorpion figure and Might & Magic Clash of Heroes with several figures and bonus items.