Unscramble these letters and you get the name of a Halloween movie villain.

The unscrambled letters "Baciohd ercna" spell "Dr. Chucky", referring to Chucky from the "Child's Play" franchise.

Now, let's evaluate the statements about Chucky:

1. True – He has a ghost for a sidekick: False. Chucky, the doll, does not have a ghost sidekick, though he does interact with other characters.
2. True – He’s an antagonist in the film called Reverend Dante: False. Chucky is not an antagonist in any film called Reverend Dante; he's primarily known from the "Child's Play" series.
3. False – He is a fictional police officer: True. Chucky is not a police officer at all; he is a killer doll.

Therefore, the correct villain indicated is Chucky from "Child's Play".