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.
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.
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.
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.
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!
All SD cards work on the DSi.
It has anti-piracy protections that prevents a lot of flashcards from being used on it. There are many r4 XL card, which can support Nintendo DSi console. such as r4i gold card from r4ids.cn,r4i gold v2.0 from r4ids.com,r4i sdhc card,r4 XL,dstti and so on.
New r4i gold card can work on Nintendo 3DS V3.0.0 console, just download and install the latest wood r4i V1.45 kernel. If your r4i gold 3ds card is very old version. You need to upgrade the card in a DS Lite or DSi console.
Yes
yes
Yes, it will.
The r4i gold card is much better than r4i ultra card. The r4i gold is most popular in the world. it can work on Ninendo 3DS, DSi V1.4.4 and DS console. the r4i gold firmware keep on update to support latest 3DS system update. But the r4i ultra card is a very old console. it is now out of production. And as lack of firmware update, it can only work on Nintendo DSi V1.4.1 and DS lite console.
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.