EZ Flash 3in1 GBA,RAM Expansion Rumble Pack (Black/White)
This EZ Flash 3in1
worked great the first time without even having read the manual (I
don't think there even was one). Very easy to use. Once it's in, there's
no risk of it falling out.
The EZ-Flash 3in1 Team announces the
one stop expansion pack solution with integrated 256Mbit of memory.
Featuring GBA support for Nintendo DS Lite, a DS Browser RAM Expansion
Rumble Pack, and a Nintendo DS Rumble Pack - ALL three cards into one
Lite sized slot-2 card! Now, it is even compatible with all slot-1 type
cards!

EZFlash 3in1 GBA function:
Equipped
with 256Mbit Norflash, 2Mbit SRAM, and Battery, so it is compatible
with almost all GBA games (except which needs special hardware).
Browser RAM expansion function:
it uses the highspeed ram cache as the offical one.perfect compatible with NDS Browser(JAP/EUR)
EZFlash 3 in 1 Rumble function:
Perfect
works with all official rumble enabled games. it also has three level
vibration strenth adjust. now you can adjust between power consume and
better game feeling by yourself. SDK also provide for third party
developers.