The Brothers Tachibana - S1-E22
Other mistake: Nankatsu scores to a goalkeeper that is wearing number 7 (obviously a poorly drawn 1). (00:08:25)
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)
Other mistake: Wakabayashi throws the ball to his teammates leading to the hat-trick; the ball in that shot is of the wrong size, almost twice as big as Genzo's head. (00:18:50)
Other mistake: When Nankatsu scores their third goal, several Shimada players (two during Morisaki's passage and then the keeper when he turns around to see the ball into the goal) sport jerseys with the wrong team name, "SIMADA", missing an H. (00:09:30)
The Best Keeper of the Tournament - S1-E25
Other mistake: Nakanishi is giving orders from behind, where, according to the commentator, he has a clear view of all the players. We then have a quasi-POV shot, and due to the peculiar perspective choices of this anime, we can see that from Nakanishi's spot he sees basically nobody, since the players disappear past the horizon. (00:17:00)
The Best Keeper of the Tournament - S1-E25
Other mistake: When Nakanishi drops the football after his bold words to Tsubasa, the ball doubled in size. (00:08:40)
The Best Keeper of the Tournament - S1-E25
Other mistake: In the first minutes, some events of the previous episode are repeated and certain lines (Misaki's first, about Furano) are different - Teppei Kisugi's group arrives earlier, too.
The Fight for the Final - S1-E24
Other mistake: When he dismounts from the back of the truck, the Nankatsu supporter in a yellow shirt has much more intense shade of yellow, and he is also taller. (00:20:50)
Other mistake: The Nankatsu teacher just announced the tryouts, and everyone responded positively asking for more training. Before Sanae starts her choir, the teacher is exactly the same height as the 10 year old students, contrary to the rest. (00:09:30)
Blocked Off - S1-E6
Other mistake: In the last shot of the team cheering for Mr. Oozora's promise of a meaty treat, the 11 members of the team are all wearing the same jersey and shorts, including the keeper. (00:18:55)
Other mistake: After the scene with Roberto and Tsubasa's mom, look behind the lanes of the 200 meters (above the fifth); one of the athletes in the background is sitting in midair. (00:07:20)
The Football Is My Best Friend - S1-E4
Other mistake: In the opening longshot of the Shuutetsu sparring match with Mizukoshi, the side on the right has 10 players instead of 11. (00:07:15)
Other mistake: When the Shimada players listen to the pep talk from their number 10, their jerseys just go crazy; some have written "Shimada" on it, but some others "Shimad" and there's a guy with just "SHIMA" on it. (00:05:00)
Other mistake: Wakabayashi and Ishizaki are shown in this episode as the only 2 players on the bench. The team is formed by 15 players, there should be another 2 subs. (00:04:00)
Other mistake: Talentless footballer Ryo Ishizaki juggles the ball with his foot when he's chilling riverside in a way that not even the most skilled pro in the world could pull off, not unless the ball was tied to an elastic string. He's bouncing it in a diagonal pattern just moving his ankle and somehow the ball pushed forward gets back to his foot each time. (00:06:05)
Other mistake: Misaki reminds Ishizaki about the next phase of the selection for the team. When he replies, someone drew eyelids on them, but the same color of the white of his eye. (00:02:30)
Other mistake: There are just 9 players (plus himself) when Genzo rallies the team after the goal. (00:15:10)
Kick-Off for the Future - S1-E3
Other mistake: Urabe mentions that Nankatsu lost to Shutetsu 30 to 0 (which seems rather uncanny for a 40 minutes match), but the score mentioned in the first episode was 10 to 0. The more extravagant result ends up being the canon one.
Kick-Off for the Future - S1-E3
Other mistake: The kid who wants the soccer team to stop training is told off by Sanae, who points at the good efforts on the pitch. The animation of the team in training has noticeable errors, with a player that suddenly appears coming out of nowhere from behind the rightmost one, who is standing immobile in front of the goal and after a second disappears abruptly. (00:14:05)
Other mistake: When Sanae tells to the team "Ishizaki is right!" and gives them a pep talk, she's practically a hobbit next to the others, and a couple players are on odd mounds as if it were a baseball field. On a soccer pitch you just can't have that sort of uneven ground. (00:19:00)