Factual error: A "wonky" whistle doesn't sound like a slide whistle, it should sound like a weakened version of the correct whistle mixed with the hissing sound of steam. A "wonky" whistle would also leak steam constantly instead of being blown like a normal whistle.
Factual error: At the end the Moose says his name is Marlon, but in the episode "Project A, for Astral" he was called Melvin.
Factual error: Batman is in Japan and tracks down Kyodai Ken by using Caller ID, which returns a seven-digit "555" number. Telephone numbers in Japan have 8 digits.
Factual error: Judging from how they're talking, and when they go, tickets to the concert go on the sale the same day as the concert. Since when did they start doing this?
Chapter 12 - S2-E2
Factual error: After Oro Dassyne has boasted about his fortress' defenses and the droid standung by him announces that he has spotted two Jedi approaching, Dassyne snatches the binoculars from him to take a look himself. Curiously, he holds them at a very different angle, i.e. he is not looking into the same direction the droid was looking, and still he spots the Jedi immediately.
Wavelength - S3-E8
Factual error: When Cyborg learns the hard way that Bumblebee can fly, his inbuilt Sonic Cannon rips a hole into the wall which glows with heat. A sonic weapon does not work with heat; it would shatter the wall, not melt it.
Factual error: 2-7 "The Crimsom Avenger": At Dunwyn Erwyllan grabs a bundle of money bills from a fishmonger. It may be just a curiosity since paper money wasn't used in real medevial times, but it is still odd as gold coins are still in heavy use in all other episodes. Even the royal treasury, which is robbed in this very episode, has only bags of coins and no bundles of paper money.
Factual error: When Princess Clara gives Wooldoor the shotgun, telling him that he has to shoot Live Action Cow, she racks the action, thus chambering a shell. Just before he 'shoots' the cow, Wooldoor racks the action again. This would eject the shell, but no such thing happens.
Factual error: Megatron tells Ravage that the Golden Disc was launched aboard the Voyager spacecraft, just as the Great War between Autobots and Decepticons began. Either Megatron is wrong or Cybertonian history is wrong, because Voyager was launched in 1977, and the Great War didn't begin until 1984 (the first season of The Transformers), seven years later. The disc can be read by lasers, but it was in fact an analog recording (as digital recording did not exist until the early 1980s with the compact disc). Just as well, the disc was only twelve inches wide; it looks much bigger in Beast Wars.
Factual error: At the end when Ms. Finster tells Randall to give her the names of the kids involved with the ball incident, she says to list them in alphabetical order. The first name Randall says is "Dettweiler, T.J." But "Blumberg, Mikey" would actually come before that, and given what we know of Randall, this isn't the kind of mistake he is likely to make.
The Invisible Hand of Fate - S3-E3
Factual error: When Billy is in his first Underground Quiz Match, the host says at the start of the match "Jeopardy Rules apply," then starts with the first answer. Billy buzzes in with the correct question and wins it, however, Jeopardy Rules state that contestants may not buzz in before the host finishes reading. If they do, they lose their chance to buzz in first. (00:07:20)
Factual error: As the beginning shows Krypton explode, there is a huge cloud of dust at the remains of the planet that then fades to nothing. Only space dust would not act like that from an entire planet exploding. It acted like dust settling on the ground and just fading away, rather than dissipating into space. (00:01:25)
Factual error: The Nile crocodile is a bright green color. Nile crocodiles are actually dark olive - brown.
To Battle the Living Planet - S2-E6
Factual error: The Moon is around 238,000 miles from Earth, but when the Fantastic Four go out into space to find Thor, the Moon is extremely close to Earth. (00:04:11)
Factual error: Zelda gives Prince Facade a compliment when he meets her father. Facade smiles and then looks over, the camera follows his view to a mirror on the wall. It then cuts to the mirror showing his reflection as he winks at himself. The problem is though, when the camera was panning from his position, it showed the mirror was against the wall a good distance from him, as well as facing almost a 90 degree angle away from him. So not only was his reflection too big for his distance, but the mirror would not have reflected his image back to him at that angle. (00:36:40)
Triumvirate of Terror! - S3-E8
Factual error: During the final fight in Lex's lair, Joker gives Batman a good smack with his large hammer. As is common in this show, when a good hit is delivered, a freeze frame is show with the figures moving in slow motion with a stylized colorful backdrop to add to the drama dynamics. But as Joker delivers this hit and this stylized shot is shown, the show cuts to some inmates in a prison cell watching the fight on TV. The same stylized shot is shown on their TV, where it would be show like that there, only to us. They would have just seen Joker hit Batman with the hammer and him fly off in real time with no stylized back drop or slow mo. (00:20:00)
Factual error: Ken Wakashimazu, the reserve keeper, just announces a substitution, himself, from the crowd (not even the bench!), his presence unbeknownst to the coach and everyone else in attendance. For those not familiar with the rules of soccer (or ANY sport!), that's really not how it works in an official match. (00:13:30)
Iron Forged in Fire: Part One - S1-E1
Factual error: As Tony is being escorted to Obadiah Stane’s office six months after Howard’s death, there is a close up of Trish’s computer keyboard. Everything on the keyboard matches up how it’s supposed to be on a QWERTY layout, except rather than the 4 being between E/R or above the R, as is standard on all keyboards, it's between R/T. All the numbers are moved over from where they are supposed to be. (00:07:50)
Factual error: When everyone went up in the hot air balloon the sun and the moon are both visible. The illuminated side of the moon is facing in the wrong/other direction from the sun, which doesn't work.