Huh, the +6 Stats code works for me; my Absol has the + symbol on the touch screen and all seven stats have 6 pink/purple upwards-pointing triangles, like it's supposed to.
Is there a way to check version number? I thought I had installed the most recent version, but +6 Stats works, so...maybe not?
I just wish there was a Wild Pokémon Modifier code; not only would it make rare Pokémon much easier to encounter and catch (LOOKING AT YOU, MIMIKYU), but it would also allow for incredibly quick EV training (if it supports SOS, anyway) or instant Lv. 100 Blissey for incredible EXP earnings.