Doing a "Monkey D. Luffy" on a 2DS

I want to buy a 2DS for a kid and because I don't have any money for games, I want to "Straw hat" it. You know what I mean, a full "Captain Jack Sparrow", "Monkey D. Luffy", or, how the simple people might call it, "arrr!".

I don't know much about doing this and the threads seem a little complicated. Can the 2DS be over 9.2? I don't want to buy any flashcards.