Strongest character in each of my favorite series

 I wanted to make a quick reference blog of who is the strongest character in each of my favorite series to my knowledge. If it's not clear imo I'll say the general arguments for each. Also this is taking everyone at their peak.

Axis Powers Hetalia:

The character that would probably win in a fight against everyone else is the Roman Empire. All the characters are these conceptual entities but Roman Empire is an astral-conceptual, being the ghost of a concept. Nobody else in the verse can hit him while he can still physically effect them and kill them. He also has the most hype in the series of all the nations, and is said to have been the strongest nation although whether that means in general or just of his time is unclear. Even without that he should be pretty strong in raw power being a militaristic empire that was 5 million kilometers squared. While modern day America and Russia are probably the physical strongest he's probably at least in the same tier and they can't really effect him. Canada is in the same tier, since he is said to have power equal to his brother America but is too gentle to use it. 

Bayonetta:

So the strongest character as of Bayonetta 2 is Omne since the three god tiers Jubileus ruling Heaven, Queen Sheba ruling Hell, and Aesir ruling Chaos in between seem to be relative and Omne is formed of Heaven and Hell combined and overpowered Aesir. Fairly straightforward.

Cardcaptor Sakura:

This one is also pretty clear, by the end of the series Sakura is the strongest. Eriol who has Clow Reed power specifically says she's stronger than him, and because the anime and movies are canon because they are written by Clamp Sakura converted the Nothing into the Hope meaning she overpowered an entity equal to all 52 of Clow Reed's cards which the manga says he put all his power into. You could maybe argue Eriol/Clow Reed could still beat Sakura just from being smarter but the problem with that is A: Sakura is no slouch when it comes to intelligence herself and B: Clamp mages have magic resistance so Sakura being higher in magic means Clow Reed wouldn't be able to magically affect her. As a magician this means he basically has nothing he could do to her. It's also just narratively implied by the fact that Clow Reed couldn't do anything to the Nothing except seal it away while Sakura actually did beat it that she has surpassed him as a magician.

Commedia:

Obviously this is just God. No one else in the story is even vaguely kinda close to God and all the High Tier characters get their power from closeness to God.

Cutie Honey:

Witch Zora is without a doubt the top tier of the verse, at least of the original Go Nagai continuity. While everyone else is messing around at wall to building level, Zora can turn into a giant living island, create giant whirlpool around her and had to be bombarded with nukes to be killed...only for her to resurrect later. She created all the villains who worship her as a god and the heroine struggles with.

Danny Phantom:

So the obvious answer is Reality Gauntlet Freakshow as he has essentially godlike power compared to most of the verse. There's a little contention with peak Pariah Dark as the ring of rage and the crown of fire are kind of hyped up to be the strongest objects in the ghost zone, not in a way where Pariah has more raw power than Freakshow, but perhaps reality-warping resistance as he's obviously contextually stronger than the plot manipulating reality-warping the Ghostwriter. That said considering Danny with a 100 amp was able to be somewhat relative to Peak Pariah Dark, I'm pretty sure Freakshow is the god tier.

DC Comics:

So DC Comics gets kind of esoteric near the top. Before everything there was a boundless existence, the metafictional concept of the White Page, the Overmonitor. It divided itself which was primordial creation. It came to awareness of itself, this awareness being God or the Presence as said by Synnar's origin. It's uncounciosness the sleep of Brahman is Pralaya and the imagination of the people viewing it imprinted onto it being the Source, the first world, formless and forming all. So the god tier is something like "the undivided boundless God that all things derived from."

Freedom Force:

Energy X is a conceptual entity that granted all the powers in the verse including the strongest characters Time Master and Entropy so him.

God of War:

God of War 5 will likely change things, but the strongest character as of GOW 4 is Power of Hope Kratos since PoH Kratos seems to be stronger than Old Kratos, if only by a bit and the strongest characters appearing in GOW4 are only relative to Old Kratos. Thor and Odin are hyped up and may provew to be signifigantly stronger than Baldur but didn't fully appear in GOW4, though we know Thor and Jormungandr's battle splintered Yggdrasil. Yggdrasil arguably is even stronger but that's not really a character.

Magic Knight Rayearth:

Mokona seems like the obvious god tier of the verse being the literal creator of the verse, that said the individual Rune Gods were relative to him so when the three combined together I'd think Combined Rayearth is stronger, especially as they brought Eagle Vision back to Cephiro against Mokona's rules. 

Magicka:

Wizilur the Wise with the Staff of Imbalance, a staff made from part of Yggdrasil should be the strongest. Azimuth, Grimnir, and Wizilur all had the Staff of Imbalance temporarily with the ability to reality-warp the multiverse and all its concepts/laws but Azimuth and Grimnir needed the cosmic alignment while Wizilur didn't seem to need too. Assuming it's the cosmic alignment the three should be relatively even but while all three have good feats of spellcasting, Grimnir is the constantly hyped up villain of the first game known for skill and intelligence and should beat Azimuth, that said Wizilur is the founder of all magic who made the Staff in the first place and is probably stronger than Grimnir.

You can make a pretty funny argument if you accept everyone in the verse being multiversal that the scaling works entirely different as Fafnir says Assatur even weakened will be the strongest being Midgard will have ever known yet was there for the fight with Azimuth along with Grimnir. If you go or you just ignore the cosmic alignment I'd imagine the strongest would be either Cthulhu or Lok. Cthulhu has the best hype though technically the player wizards beat Cthulhu when out of practice in an extremely difficult fight and they still needed deflector to fight Lok.

Metroid:

In the games it's clearly PED Samus who beat Dark Samus after it fused with a planet of phazon. None of the other characters really compare. I'm like 90% sure Samus and Joey isn't canon but obviously for those that think it is the universal deity Animus would be the strongest character by a wide margin.

Okami:

Full Power Amaterasu is clearly strongest. The next strongest is Yami and she stomped him. Pretty cut and dry.

Ouran High School Host Club:

Honey-senpai has the best feats in the series and the best hype. Technically Mori-senpai is supposed to be his equal in combat ability, however due to his devotion to Honey-Senpai Mori-senpai would never use his full ability against him so Honey is the strongest character in the series.

Over the Garden Wall:

Pretty clearly the Beast is the strongest character in the series at least by abilities, he's the character all other characters are afraid off.

Panty and Stocking with Garterbelt:

Judgement is God and she is clearly the strongest. The closest rival is the "Other Gods" who tried to take over Heaven and Hell from her and well...she just stepped on them crushing them.

Pretty Cure:

It's gonna be one of the All-Stars villains, I imagine either Fusion or Miden. I think Miden probably has more broken abilities and would win a fight between them.

Princess Tutu:

Drosselmeyer is clearly the top tier being the source of everyone's powers, the one who controls all the events and who has the best abilities. It's implied Fakir could reach his level of plot hax, but Drosselmeyer clearly has far more control atm.

Puella Magi:

Madoka and Homura are canonically equal in terms of power so a fight between them I imagine comes down to abilities and mindset. Homura was quite intimidated by the prospect of Madoka reascending, so I imagine Madoka is overall stronger. I imagine Movie 4 when it comes out will change things substantially.

Sailor Moon:

So the God tiers are Sailor Cosmos and Sailor Chaos, with neither being able to kill each other. Personally I like to put Sailor Cosmos as stronger because Sailor Chaos failed to do what she set out to do; Sailor Cosmos' spirit was broken but her younger self's courage revitalized her spirit to fight but you could put either as Sailor Chaos was able to cause destruction against Sailor Cosmos' will. So little is known about the two that little conclusive can be said.

Saint Seiya:

So at the top of the Saint Seiya hierarchy are the primordial deities and the line of royal deities Uranus, Cronos, and Zeus. The primordial Chronos, representing space-time seems arguable for the god tier by hype but is not neccesarily. Zeus and Cronos stalemated for a while until the Titan Mnemosyne betrayed Cronos and gave Zeus the thunderbolt which probably makes him the strongest character at the moment outside maybe Chronos. The other primordials Gaia, Tartarus, Typhon etc. are up there somewhere.

Shamanic Princess:

The Throne of Yord is the obvious god tier. Tiara also temporarily becomes one with it so she is also the god tier techically.

The Powerpuff Girls:

So there was two characters I really considered; Bad Future HIM and The Gnome with all powers absorbed. It's not explictly stated HIM got stronger in the bad timeline, but if he didn't it would be incongruent with feats and you can't scale a version of HIM to a version that could be weaker without justification. There's no direct comparison but while The Gnome absorbed the powers of all the superheroes/supervillains in Townsville, the Girls after regaining their powers were still somewhat relative to him able to take his attack and do damage to him with their strikes. Conversely Bad Future HIM was able to tank the girls' strikes and was seemingly unstoppable so I think HIM is probably stronger. I'd honestly probably put them in different tiers.

I also briefly considered Dynamo whose another Top Tier but Dynamo isn't so much a character as it is a weapon being a giant robot. So it's more like the Girls with Dynamo. While Dynamo is definitely stronger than the girls made to protect them, it didn't stomp the Giant Fish Balloon Monster who the Girls were able to contain temporarily so I'd probably put it closer to the Gnome in power level than Bad Future HIM. 

The Stanley Parable:

So there's not a lot of characters in general here. The two characters stronger than the Narrator is the Female Narrator who seems to be the Narrator to the Narrator and the Essence of Divine Art. The Narrator has at least mild knowledge of the latter while seemingly no knowledge of the former, so that maybe implies the Female Narrator is stronger that said the Essence of Divine Art has more feats and hype so I'd probably think it's the strongest character atm, though the Ultra Deluxe version may change things.

Tokyo Mew Mew:

Deep Blue is obviously the strongest character in the series. Even as the Blue Knight he has a solid argument for being the strongest character in the highest non-Deep Blue tier but as Deep Blue himself he has planetary feats while the rest of the verse only gets up to city level as well as the best abilities in the series.

Undertale:

Clearly the Annoying Dog is the God Tier. It barked into a speech-to-text device and created the verse.

Wander over Yonder:

The two strongest characters seem to be the celestial being from the beginning of the series and the god turtle herself Miss Myrtle. The two don't have any direct comparison but Myrtle definitely has more hype and Wander doesn't care much about the former but does everything in his power to pacify the latter suggesting she's a bigger deal. That was an argument made by ThorGundersen and I thought it was quite smart.

Xiaolin Showdown:

Dashi is probably the strongest. He and Unsealed Wuya are treated like the god tiers of the verse and he beat Wuya, arguably twice. There's sort of an argument alternate timeline Raimundo is even stronger as he beat Wuya along with other villains with seemingly more ease than Dashi did and Wuya is implied to be at full power in the alternate timeline. Personally I don't think enough is seen of Wuya vs Dashi and Wuya's fight with Raimundo in the alternate timeline is too short to really come to apples to apples like that and am more comfortable putting Alternate Timeline Raimundo directly below Dashi and Wuya.

xxxHolic:

So this is tricky not because the power hierarchy at the top is unclear but because what counts is unclear. Clow Reed appears and is plausibly the strongest. Clone Sakura and Princess Sakura both appear but these are not the same as Sakura Kinomoto, and probably aren't as strong. Sakura Kinomoto is at least referenced in xxxHolic so she'd be strongest for same reasons as in the Cardcaptor Sakura section if you count her. Otherwise Clow Reed was greatest magician whose single accidental thought made the main antagonist of the series.

Yu Yu Hakusho:

Prime Raizen pretty clearly was the strongest. Even starving to death he was relative to the other two kings, and it's implied he was 50-100x stronger at his peak so he'd be easily the strongest character seen in the series.

Yu-Gi-Oh: 

So there's a large difference between manga canonicity and anime canonicity. In the original manga it's Horakhty who easily beat Zorc the main villain who was stronger than everyone else. I haven't watched the later series so I can't really comment on anything past Dark Side of Dimensions. I think the strongest character in the anime canon is the Numeron Dragon but can't comment beyond that.

Yuki Yuna is a Hero:

Divine Mankai Yuna is clearly the strongest. The Heavenly Gods and Shinju stalemated for a while though the Heavenly Gods would have eventually won, but Divine Mankai Yuna was able to defeat the Heavenly Gods with one all-out strike