Are the witches in macbeth good, bad, or neutral.

The witches were meant to be a catalyst for Macbeth to help bring him over to his "dark and deep desires". To be sure Witches were considered evil at the time by Elizabethans so they have all the trademarks of Devil worship and the black arts. So yes they were "bad" but I think Macbeth was the one who was really wicked to begin with.

BAD the witches are evil and tricked Macbeth to murder the king

Witches is not good. No matter what the situation. But in this case the witches were not bad either. They only planted a little seed in Macbeth's mind. It was Macbeth himself who caused the seed to grow.