I don’t see any reason the Google “leak” could be true; while, yes, it could be a screw up from Nintendo in the Netherlands (that’s the website the ad took you to), it’s far more likely either a troll or angry employee paid for it for a while because:
1. Dragon Quest characters like Erdrick and Luminary didn’t trigger the ad.
2. Artorias nor anyone other than Joker triggered the real ad from Nintendo, the one that took you directly to the Smash Bros. website.
3. While “Hero” could have triggered the ad, we have no proof of this.
4. If we’re assuming names have to be exact and that’s why DQ characters didn’t trigger the ad, then Banjo shouldn’t have triggered it either when just using “Banjo” or even “Banjo-Kazooie” since “Doom Slayer” is the only one that worked for Doomguy and the duo is called “Banjo & Kazooie.”
Honestly I was kind of hoping it was real before, too, but that’s only because Banjo-Kazooie was on it and I even started to not believe the Google thing before their reveal since it seemed it could easily be faked by any troll willing to be stupid and waste a good amount of money to mess with people (assuming they actually needed a lot like what was said).
Has this been shown, or is this just some BS fan theory? Because I haven't seen any proof of this, or anything regarding the Google theory for that matter. Its continued existence hinges on the fact that nothing about it is falsifiable one way or the other. You can say "Artorias was a glitch" because the layperson doesn't understand how Google's algorithms work. You can say that Hero would've triggered the ad, but it's impossible to verify that too when they don't trigger for anyone now, and the pool of people who could search names was always limited to those with European ISPs. And yet nobody can explain why the ads were there in the first place, why they were only triggered by incredibly specific keywords, or if they worked on any other characters people never had the chance to test.
It's just plain silly.
Not to place a tremendous amount of importance on "being right" on the internet, because I absolutely don't, but remember that the opposite is also true. If the rumor is false (and it probably is) then you're one of the few people currently falling for it.
Perhaps I came off as a bit of a **** by mentioning "gloating" if I happen to be right.
I'll happily admit to being wrong as I was wrong about the Grinch Leak, which was much more popular.
But I also think that people are sleeping too easily on Google Leak, as it is precisely how most major things leak. A modern example would be Best Buy's early leak of Joker's model. Google is like Best Buy here, a major middleman between Nintendo and the public.
It was also not posted on any forum and was found by accident, which I doubt any troll would pay for if they even COULD buy an ad for something they don't own.
Speaking of a troll buying an ad, it was not able to be replicated, which would be easy if all it took was a troll with money to buy an ad that a big YouTuber would just happen to stumble upon.
There were also the "down periods" and eventual removal of the leak altogether, which are points in favor of Google Theory.
So let's go over the possibilities:
1. A troll bought ads.
This seems to be the consensus, but I explained earlier that this seems unlikely, as if it were that simple, then Google Theory could easily be replicated, which it never was. Also, it would seem silly of a troll to buy ads just HOPING someone stumbled upon the ads and spread them like wildfire.
Unless PapaGenos himself or someone in his Discord server was the troll, the alleged troll would have to be a madman to expect these results.
2. It was just a glitch in Google's Algorithm.
If I am proven wrong, and Doom Slayer and Ryu Hayabusa are not the last two fighters on the Fighter's Pass, this would be my guess. Though possible, it seems so odd how specific the parameters of the leak had to be to get consistent results. Watch the PapaGenos videos on the subject if you are unaware of how this leak worked.
Artorias was likely a glitch because of how searching "DLC" would bring up the ad with ANY character searched, even SpongeBob. But searching specific names of DLC packs for other games triggered the ad, and Artorias just happened to be the name of both a specific character AND a DLC pack.
Had anyone thought to search "Hero" at the time and triggered the ad, I would be 100% convinced Google Theory is accurate, but here I sit at 70% convinced.
EDIT: Forgot this major point, but if this was a simple glitch in Google's algorithm, then it likely would have happened to more than just five characters if you count Artorias but assume Hero wouldn't have triggered the ad.
If it were Google's algorithm being funky, you'd expect way more characters to consistently trigger the ad.
3. Google Theory is accurate.
Since I explained the unlikelyness of the other two options, then by process of elimination, this would be the correct option. Still, unlikely does not mean impossible, and the other two options COULD be correct, but for my two cents, I think Google Theory is likely correct, and had "Hero" been tried as an option, we'd likely all be on the same page.