Continuity: When Charlie is jumping over the clothesline in the rollerblading scene, the clothesline disappears as he jumps.
Continuity: The scenery changes repeatedly during the rollerblading sequence.
Continuity: Charlie's arms when he's sitting at the bus stop.
Continuity: Julie's helmet as the Ducks are paying homage to Hans.
Factual errors: There are several infractions/misapplications of the rules of hockey.
Continuity: When Portman gets sent to the penalty box, he performs a striptease, yet when Ken Wu gets sent to the penalty box less than a minute later, Portman is fully dressed, pads and all.
Audio/visual unsynchronized: When Julie is in the goal singing about how Fulton scored, you can see that her lips are not moving from behind her mask.
Audio/visual unsynchronized: At the end of the movie, Dwayne Robertson says, "Hey, look what Bombay did," but his lips don't move.
Continuity: In the final seconds of the game, the announcer says that Conway has a breakaway, in the next shot, we see a Warriors player in front of Conway.
Continuity: In the final game, Dean Portman's helmet straps disappear and reappear repeatedly.
Continuity: While showing the Ducks touch the ice in memory of Hans, you can see #21 skate by. 21 is Dean Portman's number, though he doesn't show up until after the 2nd period of the game.
Continuity: Right after Charlie takes off his shoulder pads after the first practice, you can see him taking them off again when the scene changes to Connie looking at the list.
Errors made by characters (possibly deliberate errors by the filmmakers): Julie's song says that Fulton has only been able to skate for one year but he joined the team in the first year, which Charlie says was four years ago.
Continuity: Adam Banks is left handed while playing hockey after being right handed in the first two movies.