The Time It Takes To Get Places Varies A LOT Per Movie
In Shrek it is shown to take at least one day for Shrek and Donkey to make it to Dragon’s keep.
In Shrek 2 it’s apparent that the kingdom of Far Far Away is FAR FAR AWAY from Shrek’s swamp. This distance is again confirmed when it’s revealed that Prince Charming took so long to travel between Far Far Away and the Dragon’s keep that he didn’t make it in time to save Fiona (although, he could have gotten lost).
Either way, in Shrek: Forever After Shrek is given 24 hours in an alternate reality after signing Rumpelstiltskin’s contract. He spends the first few hours messing with villagers and then makes it to his swamp after seeing a wanted poster of Fiona’s. While at his swamp, he gets captured by Rumple’s witch army and is taken to Far Far Away (which is very far from his swamp) and THEN, after escaping Rumple’s castle, he heads to the Dragon’s keep. At this point, they should be way over 24 hours in. [But no, there’s another whole half of a movie to go], Shrek finds Fiona and the other Ogres, plots with them for a while, then they get captured and brought BACK to Far Far Away.
In conclusion, they had three established locations with established distances between them, and completely ignored that.
-From Redditor u/Halvpolack
Rumpelstiltskin Is Two Different People?
In Shrek The Third, Charming is talking to all the villains in the bar, pointing out how they’ve been cheated out of their “happily ever after.” He turns to a small man sitting at a table and says, “And you, frumpy pigskin…” to which the man replies, “Rumpelstiltskin.”
The whole plot of the fourth movie is that Shrek makes a deal with Rumpelstiltskin, but the one in the 4th movie CLEARLY isn’t the same as the one in the 3rd.
From Redditor u/ellypsii
Why Would The King And Queen Turn To Rumpelstiltskin For Help If Harold Knew The Fairy Godmother's Plan Was To Have Charming Rescue Fiona?
In the beginning of the fourth Shrek, the king and queen go to Rumpelstiltskin because they’re worried that Fiona won’t ever get out of the castle. But I thought the day that the Fairy Godmother turned Harold from a frog into a human they made a deal that her son would marry his daughter Fiona. So why does the fourth movie show the king so worried about Fiona getting free when he already knew about the Fairy Godmother’s plan? [It doesn’t matter that he was worried or that Lillian didn’t trust her, because his transformation/happy ending depended on the Fairy Godmother too].
-From Redditor u/iactuallylikeshrek3
Even If Fiona Had Married And Kissed Farquaad, The Curse Wouldn't Have Been Broken
Fiona’s curse can only be broken by the kiss of her true love. If she had kissed Farquaad, nothing would have happened – [and it makes no sense that she doesn’t realize that, since she’s clearly not interested in him].
-From Redditor u/lurkmode_off
The Ogres From The Alternate Timeline Show Up In The Regular Timeline, Even Though They Wouldn't Have Known Shrek
At the end of the fourth movie when the credits start rolling and everyone is singing and dancing, we see the other ogres from the other timeline – where did they come from? [How is this possible?]
-From Redditor u/looking_at_memes_
Farquaad Is Given Three Princess Bachelorette Options To Choose From, But One Wasn't A Princess
In Shrek, Lord Farquaad is given three princess bachelorette options that would further help his goal to be king. However, the first bachelorette, Cinderella, is not a princess and so would not have furthered that goal
-From Redditor u/Steve_OH
There's No Way Dragon Could've Become Pregnant With Donkey's Children
[There’s no way Donkey would have been able to impregnate Dragon. There’s a theory that when he drank the potion and transformed, so did she, and then they’d be compatible], but Dragon was hinted to have been pregnant well before the Happily Ever After potion came into play, and showed up with already born babies immediately after the conclusion. No way was she impregnated, came to term, and gave birth in the 24 hours between the potion taking effect and wearing off. Also, [the spell wasn’t made permanent, so any babies made as a result of the potion would have disappeared].
-From Redditor u/NespreSilver
How Would Farquaad Be Able To Evict Anyone With Magical Powers?
In a world with curse-using witches and magic mirrors, you’d think you’d want to keep some magic users on your side. But Farquaad not only rejects them, he was able to evict and relocate them to a swamp. There were witches, wizards, and the fairies from Sleeping Beauty… [how does it make sense that he would be able to evict them?]
From Redditor u/Geoxaga
Shouldn't Fiona Be A Human In 'Shrek: Forever After'?
I understand Shrek signed a contract with Rumpelstiltskin [in the fourth movie], in which Rumple could take a day of Shrek’s life and he chose the day Shrek was born. So with Shrek never existing, Fiona’s parents would’ve signed that contract with Rumple (the one where they’d trade their kingdom so her curse could be removed).
Therefore, [once the contract was signed] Fiona’s curse should’ve ended and she should’ve become a human full-time.
From Redditor u/ShrekandtheHolyGrail
It Doesn't Matter That Charming Had Help, He Still Shouldn't Have Been Able To Take Over The Kingdom That Easily
How could Prince Charming take over Far Far Away so easily? All of those soldiers that defended the castle in Shrek 2 were nowhere to be seen until they later showed up to take Fiona hostage and go on a manhunt for Shrek. How could Charming have the army on beck and call while the city literally burned around him – did people really hate the idea of an Ogre ruling that much? [They seemed to like him in the play!]
-From Redditor u/WINDMILEYNO
Why did the Far Far Away army betray the royal family and join Charming? I don’t get it at all, [people seem to like the royals and Shrek] and it’s not like the kingdom was outnumbered by the criminals. Also, Charming was literally just kicked out of the city for trying to take over the kingdom – the army should’ve taken him into custody right away.
-From Redditor u/HashKane
How Did The Fairy Godmother Not Have A Contingency Plan In Place For The Possibility That Someone Would Rescue Fiona First?
I mean, it seems like a pretty risky plan on the part of Fairy Godmother, [who is known to be fairly clever]. Fiona is basically out there alone with no supervision and no way for either Fairy Godmother or her parents to know how she’s doing. She could’ve been carried off by anyone else at any moment, and that’s exactly what happened!
If the plan was to blackmail Harold into having her son be king, [the way she went about it doesn’t really make sense]. Any number of things could’ve gone wrong other than Shrek finding her first.
-From Redditor u/tophatnbowtie
Why Didn't Farquaad Or Charming Try To Save Fiona in 'Shrek: Forever After'?
In the fourth Shrek, Shrek was never born so Fiona wasn’t saved by him. But what about Lord Farquaad? Shouldn’t one of his men have gotten to Fiona before she freed herself? And what about Prince Charming? He was said to have broken into the castle to save Fiona shortly after Shrek did, so how come he didn’t save Fiona and marry her?
-From Redditor u/randomfan1997
There's A Clear Anachronism
Shrek says, “Hold the phone!” in the first movie even though [cellphones] don’t seem to exist in the Shrek universe.
Shrek And Donkey Make Short Jokes About Farquaad But They Have No Way Of Knowing That He Was Actually That Short
Remember when Shrek and Donkey are making fun of Farquaad’s height in front of Fiona? How did Shrek know how tall Farquaad was? He’d never seen him before he went to Duloc, and even then, Farquaad was up on the balcony with his step up hidden from view. Shrek didn’t even know who Farquaad was until all the fairytale creatures showed up at his swamp.
Technically, Fiona Should've Stayed Human After Kissing Shrek
Fiona was born a human and had a curse put on her that turned her into an ogre at night. When she found true love with Shrek, the curse was supposed to be broken, so why is she an Ogre permanently?
The ending made it seem like she had to become ogre-esque [true love’s true form] in order to be with Shrek romantically. But Donkey got together with a damn Dragon, so the inter-species thing obviously wasn’t an issue.
-From Redditor u/567kait9lyn