Mario has no showings on that level in most games and tons of, albeit gameplay-related for the most part, anti-feats. No shit he's a top tier, he's the protagonist. The general scaling doesn't fluctuate too much in Marvel either, Spider-Man's almost always stronger than Daredevil, the issue is that sometimes they're both 9-C and sometimes they're both High 8-C.
Great logic, you wanna apply that logic to quite literally every verse or is Mario the only exception you want to make? This is an argument I can use on every verse that is long running, Mario is no exception. But the fact that he has feats from serveral subseries (Mainline, M&L, Paper Mario, Wario) makes it useable. Arguments for keys have been ******* beaten to death many times. "Mario is strong because he's the protagonist" keep up with the lore my guy, Star Child and one of the Four Heroes of Light is a better reason.
Without power-ups, you cannot hurt him in any 2D platformer, and he can two/three-shot you if you have them anyway, while you're gonna need dozens of fireballs to bring the true Bowser down.
Another bad argument yet again, power-ups scale to base form since Mario's already been able to tank them, such as fighting Luigi in the Mario vs Luigi mode. Also the Fire Flower nor Hammer Suit are amps, argument nulled. Are you seriously using hit points as a thing to debate durability? Do game mechanics not exist to you? Also dozens of fire balls is an exaggerated number, you should know from playing it hardly requires that many Fire Balls (and the hammer is even better).
In 64, you need to sneak up behind him to throw him, if you approach him from the front he'll just hurt you (and we don't scale LS to AP anyway).
Yet Bowser would need comparable LS since he's displayed this. Also "sneak up", Mario isn't Snake, he runs past him. I should also mention those bombs are something Mario can also take without dying.
And in Odyssey, you neglected to mention that no, he cannot hurt him.
And you also neglect how the first cutscene literally displayed the two fighting for some time. Bowser is not a stonewall in canon. You'd think that if Mario can block an attack that harms Bowser would also make him scale.
In virtually all sports games, he's a power-type character, and therefore more durable and powerful than Mario.
Ah, but you also ignore how Mario can still harm him and isn't far off either. You'd also be ignoring with games that have story modes, such as Tennis Aces where Mario yet again defeats another amped Bowser. It seems to me like you're lacking on some stuff.
Mario Party (except for Super), he's basically unbeatable and just gets to take stars or coins away from you.
So you still continue to prove that you're missing some stuff. Have you ever considered actually taking other stuff into consideration than just the boards? In Mario Party 2, each ending literally has the characters besting Bowser. In the story modes for games like DS, 4, 5, etc, you are fighting Bowser at the end.
In SMRPG, you're unable to hurt him at all and he inflicts way higher damage than Mario when playable.
No offence but the more I read, the more I doubt you. The first boss of SMRPG is literally Bowser himself, and Mario won. Did you just skip past that? If we're going by stats, Mario's attack power is only 0.8x weaker.
Baby Bowser is still too strong for Yoshi to directly damage, though shockwaves do the trick.
Despite the fact the sequels display otherwise and Baby Mario defeats Baby Bowser in PiT? Dude, come on.
That's because Mario's more skilled, not stronger.
Skill can only take you so far, especially when you'd be ignoring everything the RPGs displayed.