acid erosion, citrus acid, sugar, build up of plaque
Stains.
water does not really have an effect on teeth because there isn't anything in it to harm your teeth.
water by itself is harmless, but minerals in water can have an effect on teeth.
the sugar in the gum can wear your teeth down :(
Yes to much of chocolates and sweets do cause cavaties in the teeth.
They will shine and there will be no harm
it doesnt harm your teeth to have a fizzy drink once in a while but if you drink them too often, they can rot your teeth
Not really, but if you eat too much then, yes.
If water has a low ph balance consisting more of acid and less alkaline it could be considered to harm your teeth more of the enamel though comparable to some juices.
You would be scrubbing a dark substance into your teeth with the toothbrush, this will lead to staining.
Using bicarbonate of soda to brush your teeth occasionally is considered safe, but frequent use can erode tooth enamel and lead to sensitivity. It's best to consult with a dentist before using it regularly to ensure it won't harm your teeth.
Very small teeth that feel strange, but won't harm you. Be more weary of the barbs on the side of its head/on top.