I was going to use my table to make an estimate of who would win week 2, but I have no clue as to what 3DS is capable of in Japan.
I'll have a go anyway:
If 3DS Japan remains about the same as week 1... ethomaz should win (based on approx 245k, 278k and 350k for Wii/360/PS3) if it has an increase of 20k, it will probably be between postofficebuddy and pineapple, and an increase of 40k will see pineapple win. If it increases by 60k or more then it should be non-gravity's week.
Currently I reckon it will be between a 30 and 50k increase, so I expect pineapple wins.