This is science

1. No, bulbasaur is part poison type, the fruit would most likely be lethal.
2. It is canon that water produced by Pokémon is bitter and undrinkable, even when purified.
3. Clefable.
4. Horrifying.
5. Marshmallow, definitely.

Oooh wait is this THE Alex Hirsch, the creator of Gravity Falls?