Continuity mistake: Roberto realises Hyuga's fright technique; as he does that, the person between himself and Mrs. Oozora is wearing a white shirt. Reaction shot on her, and it's a man in yellow that was in a different position earlier. (00:11:20)
Continuity mistake: Nankatsu loses the ball after the 1-2 kick-off. Urabe is quick to chase the ball. He looks at his opponents to his left, but then in the next shot he's looking at them...to his right. (00:13:15)
Other mistake: Behind Ishizaki on the bench as he incites Tsubasa in the last action of the episode, Manabu's legs and feet do not link correctly (something went wrong in the drawing, he's sockless all of a sudden and the ankles are much wider than the feet). (00:19:25)
Character mistake: Rare instance in this anime, a foul is given when four players from Meiwa tackle Tsubasa at once and hook his foot when he successfully evaded them. In truth though, any referee should have blown the whistle already way before, since the four ganged on Tsubasa throwing themselves at him multiple times before that one, each time sticking their leg out without even aiming at the ball - Tsubasa has to literally duck to avoid one of those tackles.
Continuity mistake: Ishizaki makes an upbeat comment about Morisaki's performance, but Manabu takes exception. During the exchange, one of the boys in the background has green pants that turn blue and green again. (00:05:30)
Continuity mistake: When the sushi chef insult the client on the phone, the one in front of him has been eating and wipes his mouth after the initial surprise. However, as the shot changes, he is watching intently the match. (00:07:00)
Other mistake: In the aerial view of the stadium that follows the intermission with the sushi chef and Genzo at his mansion, there are 23 players on the field. One is the referee, you might say. In that case, the view is missing the linesmen. (00:07:20)
Continuity mistake: Morisaki makes the interception before Meiwa's number 8. In the reaction shot with the coach and Ishizaki, all of a sudden behind them it's full of people with a rather conspicuous tan who were nowhere to be seen a moment before. (00:15:05)
Continuity mistake: Meiwa's keeper during Tsubasa's 3-3 equalizer has the number 1 jersey, but in the previous episode he had number 17.
Factual error: It's the first leg of a tournament between elementary school players, and people skip work to see it, the city streets are empty because everyone is home watching it (since it is televised, too!)... That just never happens. It is not a world different from our own where everything is based on the sport (like Pokemon).
No Victory in Semi Final - S1-E21
Continuity mistake: In the first shot with Manabu cheering, he is the same height as his single-toothed friend. He is supposed to be shorter - just as he a couple of shots later. (00:03:40)
No Victory in Semi Final - S1-E21
Other mistake: When Sawada scores, in the reaction shot on the various team members Kisugi is smiling/laughing instead of being angry/worried, and the player who just lost the ball is in the background. (00:10:15)
No Victory in Semi Final - S1-E21
Character mistake: To signal the end of the match, the referee blows the whistle just once instead of three times. (00:10:25)
No Victory in Semi Final - S1-E21
Continuity mistake: When the two teams salute the crowd at the end of the match, the 11 players from both sides all wear the same jersey - no keepers. (00:12:30)
No Victory in Semi Final - S1-E21
Continuity mistake: Hyuga is looking towards Tsubasa; there'd distance between Urabe and him, but in the next shot they are arm to arm. (00:15:25)
No Victory in Semi Final - S1-E21
Continuity mistake: The scouts approach Hyuga. The woman has her right hand relaxed down her hip, but it's in a fist in the reverse shot. (00:17:20)
No Victory in Semi Final - S1-E21
Continuity mistake: Misugi's goal happens with either a high ball that curves downward, or a ground-level ball that rises suddenly, depending on the camera angle. (00:20:10)
No Victory in Semi Final - S1-E21
Plot hole: The whole team went into the match, and the tournament, without knowing its rules. They all are totally surprised by the fact that the top 2 teams qualify from each group. Of course, that's quite impossible, especially since there are veterans in the team, Tsubasa is a football fanatic, Misaki is a clever student of the game, and you just don't walk into a tournament you have prepared for and looked forward to for ages without knowing such a basic fact.
The Brothers Tachibana - S1-E22
Continuity mistake: The players are celebrating their victory. Urabe and Ishizaki in the middle are celebrating, but Urabe has Taki's teeth in the first shot, and in the second there are two Misakis and a Teppei Kisugi behind them - he should be in front of them. (00:01:40)
The Brothers Tachibana - S1-E22
Continuity mistake: Ishizaki listens in disbelief to his coach saying that Hanawa is the strongest team of the group. He points at himself, then in the next shot his arm is already down his side. (00:03:30)