Another name would be a " competitor".
Foe Rival Nemesis Villain Opponent
YOu could also call an enemy a fiend or an opponent, hope this helps :)
i believe no but you can hurt him.
Opponent
The opponent is not called by any special name.
It doesn't connect because another opponent isn't in DS download or the opponent is far than 30 feet.
That could be an enemy combatant or an antagonist or an opponent.
opponent, attacker, invader, rival
Opponent, adversary, antagonist, challenger...
Tesla
Noob?
Someone who has opposite political views than you and may debate them with you, or belong to another party than you or may be your opponent in an election.