I wondering witch carts will work on a DSi and DSi XL I got now an EZ FLASH V R4 Original R4 sdhc I would buy an DSi and DSi XL I already own the complete GBA serie and a DS and a DS Lite
This has been asked many times... The old cards for the DS/DS Lite DO NOT WORK. The DSi cards MAY work.
Non of what you listed. The best dsi compatible card is the acekard 2.i (not to be confused with the 2.1-works the same but only the 2.i works on dsi type systems). There are a few other carts...but I wouldn't reccomend anything else other than the acekard 2.i (and stay away from anything r4/r4i because they have a low compatibility rate and may not work on newer firmwares).
I'm not from Japan, but: It has been confirmed countless times. Through videos on youtube and even by a user on here. The user bought a DSi XL. Updated his AK2i, and then played it on it. I can only presume that it works since I've heard and seen a so many accounts of it. I may get the DSi later on once it comes out in North America.