Continuity mistake: In the first movie and most of this movie, Fulton Reed's jerseys say "Reed" on the back, which they should since that is his last name. However, near the end of the movie, when the team receives their Mighty Duck jerseys with the new logo, you can see that Fulton Reed's new jersey says "Fulton" on the back, not "Reed" - they've changed to his first name for some reason.
Visible crew/equipment: When the USA team is singing and skating down the streets and Coach Bombay is in the buggy, they all jump over the buggy and land successfully. But if you pause the movie you can see that the people skating are not actually the characters, they are the stunt doubles. Some of them are really funny cause they look nothing like the real characters.
Factual error: Russ Tyler's game-tying goal at the end of regulation in the championship game is preceded by several implausibilities and rule infractions that effectively would have nullified the goal. Firstly, not only is it against the rules to switch jerseys with another player (he is visibly wearing Goldberg's jersey), but there is no way he could have put on all the goalie pads in the 30-second time out. Secondly, he removes his helmet. When a goalie's helmet is removed during play, the game will be stopped and the goalie will be given a delay of game penalty if he intentionally removed it. And lastly, he skates all the way to center ice to take his shot. Not only do the players for the supposedly highly talented Iceland team not pick him up at center ice to defend his shot, instead allowing him to swap sticks with a teammate and take a wide open shot, but if a goalie with possession of the puck reaches center ice, play would be stopped and a face off would be held in the goalie's team's defensive zone.
Other mistake: Why would the entire crowd and all of the players wait after the final shoot-off shot? It would have been pretty easy to tell whether the puck went into the net or not. I understand the dramatic ending and all, but it just seems goofy.
Factual error: Throughout the movie, there are several times that players are bodychecked who are nowhere near the puck. In hockey, a player cannot be checked if he/she is not in possession of the puck. This means that the player has the puck on their stick, or has passed it but it hasn't yet been picked up by another player. If a player checks someone who is not in possession of the puck, they should be assessed a 2-minute minor for interference.
Continuity mistake: At the end of the final game when Adam gets ready to take his penalty shot they show a full body shot and it is clear that he is wearing standard CCM skate blades. There is a hole at the toe of the blade. When he starts his penalty shot, they show a close up of his skate kicking the puck and now he has Tuuk (that's the way you spell it) blades because there is no hole at the toe. Therefore, it's obvious a double is used to take the penalty shot.
Continuity mistake: When Stansson and Coach Bombay have their 1 vs 1 match, in the beginning Stansson passes Bombay, but one second later Stansson has dropped quite a bit back.
Continuity mistake: There is an exterior shot of the stadium where the Ducks play the championship game, and the parking lot is empty except for a few cars. Now if there was a huge game going on inside, with thousands of fans present, wouldn't there be a bit more traffic?
Factual error: When Ken Wu dropped his gloves and went after the Iceland player, he was given a 2 minute roughing penalty. International Ice Hockey Federation Rules state that at the very least he would've been assessed with a 10 minute misconduct, or he would've received a match penalty, and would've been ejected from the game.
Continuity mistake: During the game against Trinidad, when the Trinidad player scores the goal, the shot of the player shooting shows Goldberg on the left of the net and extending his stick/right pad to block the goal with the right/center of the net wide open. However when the shot changes to the back of the net, Goldberg is now to the right and has his glove extended with the left/center of the net wide open.
Continuity mistake: In the first game against Iceland, the score is supposed to be 0-2 Iceland. After wu comes back, the one bash brother slams the chair, in the next shot from behind the net, you can see it's 0 - 5 Iceland.
Continuity mistake: At the end of the film they are carrying the US flag around the ice. As they wave it, it wraps around the pole, but in the next shot it is straightened out again.
Continuity mistake: When the Ducks are fooling around with the beach ball and the Iceland team shows up, the ball rolls away to the left of Stansson, but then in the next shot it is at his feet, so he can then pick it up and pop it.
Answer: There may be a number of reasons, but the most likely is that, if players work really well together, it makes sense to have them on the same line, regardless if they are both enforcers or not. To give an example, the 1990s Detroit Red Wings had the "Grind Line", which consisted of three forwards who were all known for their aggressive, physical style. The two wingers in particular were team enforcers. They meshed so well as a unit it wouldn't have been as effective to split them onto different lines, just to provide an enforcer to each. The combination of all three on one line worked very well, and other teams copied the format, though of course it was not unique to this team (see, for example, the Philadelphia Flyers' Legion of Doom).