The best thing to do is see a vet.
Robo hamsters are robo hamsters, they can be about 2 inches long on average, and stay robo hamsters.
No citrus fruits for hamsters.
Yes.
on the bottem
yes
yes
No difference- a robo hamster IS a hamster!
They can grow up to two inches
yes you can idk
Yes
No, and actually that would electrocute them
Room Temperature water