It does work perfectly, so you'll be good to go. but make sure you get the R4i Sdhc and NOT the R4 Card because the regular R4 Card only works on the DS and DS Lite and NOT the DSi system.
It does work on the dsi but make sure it also works on the 1.4 update on DSi - most are clones. Best place to get a genuine R4i would be:
http://www.myr4card.com or http://www.modchipstore.com
DX used to be a good place to get it, but they are not carrying them any more.
http://www.mygamingmart.com/r4i-r4-i-sdhc-p-120.html
I would recommend the Acekard 2i which is better as it has better support and better update offers. Also Supercard DS ONEi is also very good as it comes with firmware updater hardware
http://www.acekard.ca/AceKard-2i_c_2.html
or
http://www.acekard.ca/SuperCard-DS-Onei_c_4.html
cheers
the r4i v1.4 card is the old version, it can only work on dsi v1.4 and below console. No the latest r4 card for dsi is the r4i v1.4.5.
If you updated the DSi, the new update may prevent you to use the R4i
Both M3i Zero and R4i card can work on Nintendo DSi V1.4.3 console.
The R4i will work in all DSis with the 1.0-1.3 firmware. It will NOT work it your DSi has been updated to the 1.4 firmware.
Of course, the r4i sdhc card can work on Nintendo DSi V1.4.2, DSi V1.4.1, DSI V1.4, DSi XL, DSILL, DS and ds lite. DSi V1.4u is also compatible.
Of course, r4i gold card from r4ids.cn can work on Nintendo 3DS, DSi V1.4.3, DSi V1.4.2, DSi V1.4.1, DSiLL, DSiXL, DS and DS lite.
yes it does only if u have the latest firmware. Both the r4i sdhc 3ds card from r4i-sdhc.com and r4i gold 3ds card from r4ids.cn can support DSi european!
yes they can and u welcome
You will have to buy R4i, because R4 doesn't work on DSi.
the r4i gold card can work on DSi V1.4e directly, no need any upgrade. Just install the latest wood r4i gold kernel to the SD card, then it can work.
If your r4i gold is genuine card from gamezway.com, it can work on below Nintendo console: 3DS, DSi V1.4.3, DSi V1.4.2, DSi V1.4.1, DSiLL, DSiXL, DS and DS lite. DSi 1.4e is surely compatible.
Nintendo DS/DSL/DSi are region free. Thus it does not matter where the hardware is from, it will play all games including all R4i cards. The latest r4i gold card from r4ids.cn is r4i gold 3ds card. It support Nintendo 3DS,DSi and DS console. with all versions, including EU DSi. R4i Gold from r4ids.cn support all DSi version. Such as: DSi V1.4.3, DSi V1.4.2, DSi V1.4.1 and DSi V1.4. It also support Nintendo 3DS, DS and DS lite. Good card.