This is very much a big misunderstanding and, without offense, it comes as if you never played DMC 1.
I disagree because there are statements that prove that the Devil Sword Sparda is not the only reason why Dante was able to defeat Mundus and that he also did it via his own newly unlocked power:
- (2:52)
- There is a statement in a guidebook that straight up says that Dante defeated Mundus via the combined power of the Devil Sword Sparda and his own unleashed power, but I don't remember which book I saw it in and I'm still looking for it.
- In another guidebook it is said that Dante was too lazy to unleash the true power inherited from his father, which implies that this is what he finally did at the end of DMC1. But again I don't know where I saw it and I'm still looking
Let's start with the history of DMC video. For starters, it is only a recapitulation of all the events in the series that had led to DMC5, it doesn't go in depth regarding said events.
The line "In the face of Mundus' cruelty, Dante's anger erupted lie never before...the true power Dante inhereted from his father Sparda was unleashed, which he used to seal Mundus away once again" This is literally summarizing the whole fight. With the context of DMC1 we know that "Dante unleashing the power he inhereted from his father" is about his being able to use the Devil Sword Sparda to it's fullest extent, achieving this form is what allowed him to contest Mundus power.
Same with the Triny of Fates, the context from DMC1 is important as it complements what the book says. Also, quick note how Mundus felt threatened by both Vergil/Nelo (despite being already under his control) and Dante. The only reason why Dante was able to stop Mundus is because Mundus himself feared that Dante could eventually become as strong as Sparda, otherwise Mundus could have literally folded Dante after opening the portal and going after him.
The scan you are talking about (the DMC2 one) explicitly says how Dante's heritage and the Devil Arm that were passed to him were necessary to confront and defeat Mundus, this is because only Dante could exploit the DSS and get the full extent of its power out because he is Sparda's son.
But the most important thing is this:
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What Dante is describing here is literally what happened to him when Mundus killed Trish, what happened to Sparda when Mundus attacked humans 2k years ago, and what happened to Nero at the end of DMC5 when Dante and Vergil were about to kill each other, which made them much more powerful.
You are incorrect. At this point Dante already had learned the value of Justice, Humanity and Heart (literally one of the biggest plot points of DMC3
Dante's Awakening). This is absolutely NOT the same thing as Sparda awakening to Justice, nor is it what happened to Nero at the end of 5 (Nero story in 4 is about his protecting others lmao).
Like the scans you posted say, what we explicitly see in the game, is that Dante's anger is finally unleashed without restraint. This is what allowed him to tap into his demonic heritage and use Sparda to the fullest of it's ability.
Narratively for Dante at the end of DMC1, it's the equivalent of Goku unlocking SSJ1 when Frieza kills Krillin during the Namek arc. It wouldn't make sense if Dante didn't have a significant and definitive power-up (and it would also go against the core theme) and only beat Mundus because he had the right weapon.
Not really. As we see during their final confrontation, a weakened almost dead Mundus was more than enough to match Dante's power in the human world which is consistent with him in the statue form almost killing Dante quite easily. If this was akin to Goku SSJ1 against Frieza then Dante would have used the same power he employed and fought Mundus off or even killed him at that point, similar to what Goku did to Frieza, instead he is weaker and barely able to fight Mundus off.
Also, the problem here comes from the idea of Dante awakening to justice and gaining a power boost when that is not the case as I explained above.
This was retconned by Before the Nightmare and Visions of V. In it, Dante says that all those "so-called" powerful demons and demon kings were sheer disappointments. It wouldn't make sense to say that if one of those powerful demons had defeated and literally crucified him in the first round (which is why I think retroactively Dante was never in trouble against Abigail).
He mentions 3 titles of which they clearly belong to Demon Kings/Gods. Abigail had none of that and it's power was only stated to once rival a demon king or something along those lines.
Now, the argument here for abigail/sid being a disappointment after Dante literally got stomped is that, like always, he grew stronger in response to the guy and one shotted him quite easily after that.