which card to use in dsi

i have bought a dsi for my son for christmas and would like to know which card they take i have a r4 card for my ds will this work in it if so wot do i do to it to make it work if not wot do i need thank you in advance

The R4 won't work on the DSi.The best card to get for the DSi is the Acekard 2i.
http://www.dealextreme.com/details.dx/sku.18728

thankyou 4 that will now google it 2 find sumwhere closer 2 home 2 get one or if anyone knows anywhere in north west england 2 go would appreciate it thanks ;D

I use these, very reliable and quick delivery http://r4zone.co.uk/

I use a DSTTi card for mine, it can also be found on dealextreme.com. I haven't had any problems.

use the r4i works on both dsi and ds lite