DSi, R4i Questions

Ok, pretty soon I`m gonna get an R4i. Couple questions:

1. Do they work on a Dsi XL running v1.4 firmware?

2. What one should I get? Theres like 37 diffrent kinds.

3. Any suggestions for Good games to get?

4. Any other info?

Go for DStwo.
It can emulate GBA.
But if you want something cheaper, go for TTDSi

BAMP

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I am also interested in this.....