ShinyLatios
Nintendo 3DS Legend
Towns Folk
The fact that the 3DS was around while Gen V was happening does not mean that production for X/Y had already started. At the time, 3DS sales were really low and it could have been suicide for the franchise to make X/Y that early. Do note that they had the Dream Radar extension for 3DS, so it's not like they completely forgot about it. Gen V being only for the DS was just simply because the 3DS hadn't gained enough popularity yet.