Other mistake: Zack transferred his powers to Adam, thus giving up his ability to be a ranger again. So technically, he should not have been able to morph into the Black Ranger.
Suggested correction: It's in the title "Once and Always" and repeatedly said, "once a ranger, always a ranger". This is not a "mistake" of the movie. This movie is a one-off anniversary special. Not in complete line with the show's continuity. They did this with the original Mighty Morphin Power Ranger: The Movie as well. They have also historically done this with team-ups. Such as when Adam came back to be the Black Power Ranger. Same with Justin in In Space. Same with Jason most recently. Same with Tommy (RIP).
Despite that phrase, three of the original Rangers gave up their powers to attend a peace summit; we saw the powers leave their bodies and transfer to the new Rangers. The original poster is correct that those powers were lost to them, therefore, they should not have been able to morph. Jason is the exception since he was given the Gold Ranger power, that relinked him to the morphing grid.
Again, Jason has morphed into the Red Ranger for his team-up. So has Tommy. So has Adam. In this film, they even give Rocky and Kat new power coins after saying they've been experimenting with the morphing grid. It's been a decade and Zordon is dead (or lost). You can't sit here and abide by the same old rules. When almost every team-up they've had, inexplicable rangers come back and morph. You might as well flag everything in the MMPR: The Movie for taking place in the series or vice versa.
All of the Rangers you reference still have the power to morph. Zack and Trini gave up that power as seen in 'The Power Transfer' from the series. It's one thing to point out team-ups with Rangers that still have the ability to morph, but not for Zack and Trini, they surrendered their powers.
They surrendered their powers to go to a peace conference. Assuming they cannot take them back is not logical. Powers that shouldn't exist. Especially considering Rocky and Kat were given powers. Billy is able to morph...and Kimberly, who also surrendered her powers, was able to take them back. Powers that were seemingly destroyed. Along with the Dino Megazord. Billy has shown that he has been experimenting with the morphing grid and he's had some time to do it. It's not within reason.
Neither of you pointed out that Zordon said in "The Power Transfer," "the power will always be with you and protect you." Former rangers can morph back into ranger form.
Other mistake: Technically, none of the Rangers should have been able to morph by calling for their original dinosaurs. All of those powers were lost during Zeo. As such, Billy lost his ability to morph, which was why Jason was called in to become the Gold Ranger.
Suggested correction: It's in the title "Once and Always" and repeatedly said "once a ranger, always a ranger." This is not a "mistake" of the movie. This movie is a one-off anniversary special. Not in complete line with the show's continuity. They did this with the original Mighty Morphin Power Rangers: The Movie as well. They have also historically done this with team-ups, such as when Adam came back to be the Black Power Ranger, same with Justin in In Space, same with Jason most recently, same with Tommy (RIP).
Despite that phrase, three of the original Rangers gave up their powers to attend a peace summit; we saw the powers leave their bodies and transfer to the new Rangers. The original poster is correct that those powers were lost to them, therefore, they should not have been able to morph. Jason is the exception since he was given the Gold Ranger power, that relinked him to the morphing grid.
Other mistake: Trini gave up her powers to attend a world peace summit, so the Yellow Ranger should have been Aisha in this movie.
Suggested correction: It's in the title "Once and Always" and repeatedly said "once a ranger always a ranger." This is not a "mistake" of the movie. This movie is a one-off anniversary special. Not in complete line with the show's continuity. They did this with the original Mighty Morphin Power Ranger: The Movie as well. They have also historically done this with team-ups. Such as when Adam came back to be the Black Power Ranger. Same with Justin in In Space. Same with Jason most recently. Same with Tommy (RIP).
Despite that phrase, three of the original Rangers gave up their powers to attend a peace summit; we saw the powers leave their bodies and transfer to the new Rangers. The original poster is correct that those powers were lost to them, therefore, they should not have been able to morph. Jason is the exception since he was given the Gold Ranger power, that relinked him to the morphing grid.
Other mistake: We hear Tommy morph by calling for the Dragonzord but the Green Ranger powers were lost forever, he should have morphed into the White Ranger with "Tigerzord!"
Suggested correction: He has appeared multiple times as the Green Ranger since then. This is a different continuity. Just like the original Mighty Morphin Power Rangers: The Movie.
Plot hole: If Minh knew about the Power Rangers, their identities and their history, it makes no sense that she would expect to morph without being specifically chosen to become the Yellow Ranger.
Suggested correction: The rebel teenager archetype. If I had a dime for every time a kid didn't listen I would be a billionaire. It's not a mistake.
It doesn't make sense at all that Minh would expect to morph just because she had a power coin in her possession; she had to have been told about how it works.
Pretend that morpher is a gun and she's a teenager in the real world. To say no teen would pick it up, disobey an adult, just try it themselves is a joke. She's a kid. Kids do stupid stuff and don't listen.
I'm sorry, but I disagree. We are talking about the daughter of a Power Ranger, not a typical teenager. Trini, being the type of person she was, would have explained how it works; it is highly unlikely that Minh would make such a careless choice.
She didn't discover her mom was a Power Ranger until after death. There was a whole scene where she walked in, and Billy and Zach accidentally revealed it to her. Also, itization. All she's done was make careless, impulsive choices.
Factual error: Kat morphs by calling for the Pterodactyl but she wasn't a ranger when the Pterodactyl was in use, she became the pink Ninja Ranger so her call should have been, "pink ranger power!"
Suggested correction: It's explained in the movie. Alpha made proxie power coins, in order for them to access the dino powers. She was given the Pterodactyl coin and the dino powers to get Tommy, Jason, and Kimberly back.