I have both a 3DS and 3DS XL. 3DS - 4.5.0-10U 3DSXL - 5.1.0-11U My DSTwo is latest 1.19 My DSTwo shows up as inserted for both 3DS and XL, however the XL always freezes and refuses to run it properly. Also as a bonus, on the 3DS, if I change the brightness settings while my DSTwo is inserted, then it won't boot. Whys that. Most importantly though I want my 3DS XL running a DSTwo cause I plan on buying a 3rd one as well.