Dream Radar and Pokedex 3D Pro

[Petzbreeder]

Today is my birthday (yay!) and I got £20 to spend. I'm thinking about buying both Dream Radar and Pokedex 3D Pro, but I'm not quite sure whether £20 will cover the cost of it.

Also, my 3DS is a second hand one and initially didn't have an SD card in it, I bought one but its only 2GB and not 4GB like the ones that come with them originally. Will there be enough file space to store both games, the pokemon X and Y game data (which requires an SD card) and patches?