Trying to figure out how to rip a specific menu element

[WitchRolina]

So...



See that top left image?  I'm trying to get that, but clean.  No text, no images, just that lovely detailed background thingy.  Thing is, I'm kind of a noob at this, so I'd like to hear y'alls thoughts as to what tools I should use to get it - which DS emulator, what ripping tools, etc.  I may need a little guidance after that, so if after getting the advice on the tools I still need some help figuring it out, I'll make a mention.

Please take note that this is not a ripping request - I want to learn how to get it myself, rather than have someone get it for me.