Alright though the only actual 1 here is you at least if we’re going by the definition of the term. It’s a headcanon sure, but 1 that’s backed up by the show from multiple angles and makes far more sense than the alternative of ‘Hawlucha has substantially more attack power than Ash-Greninja’.
I think simpler alternatives are:
1. Ash-Greninja's power may be not as high as you're making it out to be.
and/or
2. The anime contradicts itself all the time, and is inconsistent with the exact power levels of Pokemon. That's why applying logic equations (A > > B = C < D, ergo A > D) doesn't always work out, otherwise you're pigeon-holed into creating elaborate headcanons/theories, like for example, using the line "playing for keeps" to render Hawlucha vs Abomasnow inadmissible because it otherwise negate your logic algorithm of Ash-Greninja's power.
It isn’t, but there’s yet to be an alternative view that’s as thorough as mine. Correction: power and also speed. Charizard hasn’t been seen on-screen for about 2 sagas, so I guess your eyes must now see into the 4th-dimension xD. Nah A-G beats Zard mid diff, but sure a Pikachu at his peak battling with 10,000,000 Volt Thunderbolt would be Ash’s best and would be the 1 to gain him ultimate glory.
Charizard is Ash's most experienced battler (experience matters in any fight), who is constantly training to become stronger.
Charizard held his own against an overpowered dream Entei back in Johto. By Battle Frontier, he defeated a legendary, unlike a certain Mega Charizard X that struggled against legendaries but did decisively defeat Ash-Greninja twice. Articuno wasn't battling randomly either, but being commanded by an elite Frontier Brain. Defeating a legendary > quality losses to a Mega Charizard X that struggled against legendaries. I'm aware you're going to say that Articuno isn't as powerful of a legendary as the ones that Mega Charizard X faced, but since Mega Charizard X was not at all on the level of those legendaries, it probably would have have fared better or beaten a legendary of Articuno's caliber instead, which is exactly what Charizard did all the way back in Battle Frontier.
In your words, Iris' Dragonite is quite powerful, and yet Charizard would have annihilated it with minimal effort and barely any damage if not for N's intervention. I think even by this point during
Best Wishes, Charizard would be a tough opponent for Ash-Greninja.
So with even more training and experience, current Charizard would obviously be even more powerful. There's no way Ash's iconic Charizard, and the franchise's pet species, would ever get beaten "mid diff" by Ash-Greninja in a hypothetical battle (honestly more likely it's vice-versa). It would be an epic battle, not a laughable stomp.
Charizard is stronger than Snorlax,Sceptile,Blaze Infernape and Haxachu but not Greninja when it's using Battle Bond.It using Mega Evolution is probably a tossup but without it I don't see it being stronger.Now without abilities Greninja is at the bottom of the S tier while Charizard at the very top.
Conquered Charicific Valley. Held its own against an OP dream Entei. Triple KOs against Gary including Gary's Blastoise. Nearly defeated Harrison's Blaziken, and Harison would have won the tournament if Charizard didn't injure Blaziken that badly. Defeated an Articuno commanded by an elite Frontier Brain. Would have crushed Iris' Dragonite like a bug. Veteran with arguably the most battle experience of any of Ash's Pokemon. Would be even more powerful now several seasons removed from
Best Wishes. Ash's second-most iconic Pokemon. Beloved Pokemon of the franchise/anime. Mega Evolution or not, Charizard would be there right at the top my friend.
I don't think he truly trains his pokemon as hard as the others I mentioned above,especially Paul and Alain.Sceptile and maybe Infernape (if you don't count it previously being with Paul) are the strongest pokemon he's trained so far as a trainer.His Charizard,Gliscor,Squirtle got strong through another source,his Snorlax was already powerful before being captured,his Greninja has "battle bond/bond phenomenon" but that is something that had nothing to do with Ash's training,in it's base form it's weaker than Charizard,Sceptile,Infernape,Snorlax and arguably Pikachu.
He trains on and off-screen plenty. Paul's method is brutal and effective, but he also burns out his Pokemon and they never can rely on trainer/Pokemon bond/love for second wind because Paul doesn't believe in that philosophy.
He only beat Paul due to plot armor and even then it wasn't a real defeat,Paul should have won once Infernape fell to the ground for several seconds after getting hit by Electivire's Thunder but Electivire decided to let the match continue by stopping the referee from declaring it unable to battle.Plus Ash told Paul before that he wouldn't use Blaze yet he had to use it at the league.
Infernape would have motioned right as the ref would have finished the words, so the battle wouldn't have been over yet.
Even then, it's not like Ash used his best Pokemon against Paul. Even if Paul had Torterra/Ursaring/Magmortar/Electivire/Drapion/Honchkrow, Ash would have had counters for almost all of them after Lake Acuity and if he used his big dog lineup of Charizard/Pikachu/Sceptile/Infernape/Heracross/Snorlax, he'd have won that too.