I would say that is because SS is a cell excursion similar to your body rapidly producing adrenaline but with energy instead. SS4 is an extension of the great ape and Ikari forms. They are physical changes that alter the biological structure which remain when entering Ikari and when combined with SS utilised the new biology for the effecentcy of energy similar to how larger animals produce less heat proportionally to smaller ones and when they compress back into SS4 this process is still in effect. One theory suggests that a Saiyans Great ape form being their true state and like Freiza’s race the hominid form is a repressed state. When they go into Ikari they are retaining their optimal structure but compressing it similar to folding clothing when it is going into a suitcase rather than screwing them up and going into SS4 is compressing their state while retaining the optimised energy utilising method. SSG is a quantitative change the Ki acts in a completely different way like comparing running a car on alcohol to running it on gasoline.
[T/N: CN author took the concept on how Goku in GT can't maintain SSj3 due to endurance requirements, but can maintain SSj4 as it boosts the body to peak state or smth.]
Anime & Comics · Clay_Champion
What honor gained from participation is lost from the dubious entry and the money gained is small potato’s compared to what he has in the bank.
"Why should he complain?" burst out Fleur Delacour, stamping her foot. "He has the chance to compete, 'hasn't 'e? We have all been hoping to be chosen for weeks and weeks! The honor for our schools! A thousand Galleons in prize money — this is a chance many would die for!"
Book&Literature · Graviele
It kind of counts but the ones in my list are all official Saiyan exclusive transformations where as Super Saiyan 5 was a prank that bulma pulled on Vegeta and an April fools joke made by a fan. It’s in a limbo space where it must exist but it hasn’t been shown.
"Twenty... Twenty-seven transfor--"
Anime & Comics · OmniSpectra
For a brief moment, even Harry found himself struck by her beauty—not due to any magical allure, but simply from the natural impact of her presence. Quickly regaining his composure, Harry reminded himself of his goal to become the most formidable wizard, which sharpened his focus for the upcoming duel.
Book&Literature · TalesByJaz
Before they could answer he continued, "Because we both know I'm not an idiot, or reckless for that matter. I fought my fair share of people, and do you know what their biggest mistake was? They let me talk…"
Book&Literature · athass_prkr
It’s not a Saiyan exclusive form.
"Twenty... Twenty-seven transfor--"
Anime & Comics · OmniSpectra
"Their food was too greasy...?"
Anime & Comics · OmniSpectra
The only film I think this could be would be “Double Impact”
After dinner Sirius took the boys to a cinema, where they watched an American film that seemed mainly to consist of a series of very impressive explosions. The Muggles who took their tickets protested that the boys were too young to see the film, but Sirius discreetly Confunded them. Harry and Draco were both captivated.
Book&Literature · Nebula_Scribe
Dumbledore realized he had severely underestimated the cruelty of those muggles, Dumbledore thought at worst they'd treat him like a burden, not this. He didn't want this. Albus was able to avoid Minerva since the article had come out but knew that a conversation between himself and her - more likely her shouting at him for several minutes - was inevitable.
Book&Literature · Infinity_Weaver
"What the hell is that thing?!" Raditz shouts out.
Anime & Comics · OmniSpectra
"Since when could you speak French?!" He asked.
Anime & Comics · OmniSpectra
The snowy owl, now named Silverwing, accompanied Harry everywhere. Their connection deepened, and Harry cherished the silent companionship the magical creature provided.
Book&Literature · Mystic_Verse
Only ash will remain, the final scene,
Book&Literature · athass_prkr
But Cyrus had no such idea. An unregistered Animagus was simply a symbol of freedom.
Book&Literature · HornyFBI
'With Harry Potter's death, there will be one less headache for the future…I hope Pansy doesn't take it too badly.'
Book&Literature · Krio_Genix
Stop sparkling and do something!
He growled, "Diggory! Just do whatever you're planning."
Book&Literature · athass_prkr
And then she's gone, just like that. Issei stares after her, resisting the urge to scratch his head in confusion. Who… who did she think she was trying to fool, really? That was just… maybe if he was a complete idiot and obsessed with tits over everything else, her little act might have actually sucked him in.
Anime & Comics · CambrianBeckett
Harry released the rune, and let the creature fall down, unconscious. He smiled to himself… All he had to do was get a medallion from a Beauxbatons champion and he'll be done. Oh, how he wished he could see the look on whoever controlled this creature's face. It must have been priceless.
Book&Literature · athass_prkr
This is kind of like your R.E. teacher going on holiday for a year and coming back as your P.E. teacher
The other students were also buzzing with anticipation because Professor Quirrel, previously known for being a competent Muggle Studies professor, was taking over DADA. After a couple of years with incompetent teachers, everyone was hopeful for better instruction.
Book&Literature · TalesByJaz
Harry, for his part, felt a mix of emotions. He was proud of the progress he'd made in his training and glad to have helped bring closure to Sirius and the Black family. But he also felt the weight of the challenges still ahead. As he continued his daily routines, he couldn't help but wonder what other trials awaited him on his path to becoming a strong wizard and knight.
Harry Potter and the Silent Guardian
Book&Literature · TalesByJaz