If I hit the ball with my 2-man (or any other rod), and it bounces off the opposing goalie WALL into my goal, (with or without touching any other players), does it count as a goal for the opposing team/player?
Unless you violate a written rule, anything that goes in the goal is legal. So, e.g., if you spin the rod or if you slam another rod into the table as a distraction before the shot then it's illegal.
But the basic rule is that if it goes into the goal, it's a point. Some things that are legal:
Shot that goes off one or more men (your own or the opponents') into the goal
Shot that goes off a wall into the goal
Accidentally roll the ball back into your own goal
Shot from the five-rod
Shot from the goalie man (just one point like everything else)
etc.