Revealing mistake: Until the end of the 5th series, we can see part of the Zord costumes move about as the character in them walks about - sometimes they even look like they are going to fall off. This is particularly true in the 2nd series.
Revealing mistake: When one of Rita's monsters tears a building apart, the buildings are completely hollow, and nothing more than 6 pieces of Styrofoam stuck together to look like a building.
Revealing mistake: When we see the Dragonzord, Tommy is sometimes standing on top of it. However, it is obvious that "Tommy" is nothing more than a small plastic figure.
Revealing mistake: After the rope breaks and Bulk is on the floor, he and Skull look up as the ceiling dumps pieces onto them. After this, Bulk spits out white dust that's from the ceiling. However before this even happens as he starts to look up, you can see some white on his lips with his cheeks and mouth perched where he already has the powder in his mouth ready to spit out. (00:03:12)
Revealing mistake: For shows like this, sped up footage can be used for effect on people or items to make them seem like they are going faster. However, in the Command Center after Alpha accident'y zaps himself, he starts to flail around the room rapidly with sped up camera. The rangers move out of the way at seemingly normal speed which would mean they were actually moving slowly when filming to make it appear they were normal. This is a good effect, except the sped up camera is given away by the fact the fluctuating lights on the golden poles around the room are flashing at much higher speeds by the sped up footage, giving it away. (00:05:12)
Food Fight - S1-E6
Revealing mistake: When Pudgy Pig is standing outside of the food packaging plant, a human hand can be seen sticking out of Pudgy Pig's wrist. (00:15:30)
Revealing mistake: At the very start you can see a rod at the back of the "cake o matic" making the machine wobble. (00:00:05)
Green With Evil (1): Out of Control - S1-E17
Revealing mistake: Goldar smashes some rocks that bounce around and act a lot like polystyrene. (00:15:00)
Green With Evil (3): The Rescue - S1-E19
Revealing mistake: When Goldar flips Jason into the wall, Jason's foot moves the wall back almost completely out of shot.
The Trouble with Shellshock - S1-E22
Revealing mistake: When Trinni is on top of Shellshock, we see him fall down and it is a model of the yellow ranger on Shellshock's head. (00:16:10)
Revealing mistake: When Frankenstein throws the chain around megazord and lifts the megazord, wires can be seen lifting the megazord. (00:14:35)
Island of Illusion (1) - S1-E28
Revealing mistake: When the Putty patrol first attacks the Rangers, we see Kim jump and do a split kick on 2 Putties. However, she only connects with one but both fly back as though hit. (00:06:55)
Revealing mistake: Certain monsters in Zord battles were designed for the first series. This is so Saban could use Japanese footage of ground fights, to save on shooting their own (As the costumes from series 1 carried over into series 2). Sometimes, you can see the Megazord, and Dragonzord, getting attacked (you may need to pause it). It should be the Thunderzord, or Tigerzord.
Revealing mistake: When Rita is shrunk and put into her travelling vessel, the shrunken Rita is a very bad model. (00:12:20)
Revealing mistake: When the Dragonzord returns to the sea, the shot is reversed. Watch the water. (00:09:30)
Revealing mistake: The giant tin opener Bulk and Skull use to try and open Rita's dumpster is not metal at all - you can see the handle flopping over. It is more similar to Styrofoam.
Rita's Pita - S3-E25
Revealing mistake: The "giant ice cream" that the Rangers get for Tommy is so obviously not ice cream - it is more similar to rubber.
Answer: Probably to save on costs of filming the same scene. In the reused shots they have always morphed so you can't see the actors. They just have to pay them to do voice-overs rather than the entire scene.
Ssiscool ★