DSi games on R4 card

Hi if i buy a DSi and a R4 card for it will it allow me to play both US and Europen games on it as i can with my DS?
I heard that the DSi is regional, but will the R4 card overwrite this? ???

ds games-no matter the region-are not locked.Prehaps dsi-specific games (or for the moment-those downloaded from the dsi shop-an entirely different matter) are.I have an american copy of metal slug 7 running on my australian dsi (australia counts as (E) region).So the ds games are NOT region locked...as of yet.(FACT-australian gamers got the dsi before anyone in america ever did-a first considering games from japan usually go to america first-plus I got the 6th handed out in all of australia :) )

By the way you need to buy a special DSi R4, the DS/DS Lite R4 wont work on the DSi.

i have the NDSTTi and that works perfect on my NDSi no matter what region... so u should be good.