First off, if you don't know anything about homebrew don't bash the MMD, i'ts not a bad device... It was voted #1 homebrew deivice somewhere on the net i believe, as to Running well & saving, i say you get into NDSLIB... it's a c based language...so you'll want a c compiler, and devkitpro.
google a guide
Good luck!
P.S. Doom for the DS is loads of fun!
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