Hey i was looking around and found this DS game called DScraft.
It is sort of minecraft classic portable.
Momently its a downloadable nds rom and FULL of bugs best check this forum for news and bugs. dscraft forum
here is the download link. DScraft
I think it has much potential the maker of this game will start updating it again in december.
The first thing he will be working on are guess it....
This guy doesn't relate himself to mojang or notch.
his reason to make this game was because there isn't a DS game of minecraft.