[quote name='GohanX']I picked up a Pull N Go Folio made for the DSiXL, it fits the 3DSXL quite nicely.[/QUOTE]
This! I have the one designed for a PS Vita & loved it so got one for the 3DS XL also. Was looking for a case that can store the AC adapter & wasn't too bulky. It helps there's a detachable inner case (holds 2-games) for the times I don't need to bring the AC adapter with me. I got extremely lucky & got it for $5 because wally world still had the clearance price tag they were suppose to remove in May so they honored that clearance price (currently, it's $18). The velcro strap on the inner case flap was off by ~0.25" (since the 3DS XL length is in between a DSi & DSi XL) so I cut a piece of foam (similar to the one included to store a DSi but I didn't use it) & stuffed it in there so now the velcro strap lines up perfectly. I highly recommend this product for both consoles!