the best homebrew solution for ds lite

[lamentofking]

my brother got a ds lite back in october for his b day. now he has become interested in homebrew and stuff. which solution (by this, i mean like which product/products to buy for homebrew) do you guys think is best for the ds lite?

[Tikker]

R4/M3 DS Simply are by far the most widely used carts now

If I was just starting out now, I'd look at the ACE rpg, or the M3 REAL