Now, even though I read Fizz's lore I am not able to be certain if it is still canon, but my question comes with more what is he?
Is he a Vastayan or a Yordle? I don't really think it is possible to be both with the way 
treats Yordles so differently from other Vastayans but he doesn't necessarily look like the other Yordles we know, not to include that he doesn't even really come from Bandle City. Is there anyone who has any clue on what he is in the lore?
Sharjo7 votesHe's a god damn enigma. I can tell you he's no vastayan at least.
ForgottenLuck2 voteshmmm, guess I will just put him with the Amumu in the box of "Riots I don't really know yet, so guess" box. Thank you for the answer though.
TheHappyReaperz1 votesDidn't Riot tell us what Amumu is though? He's a child-prince of Shurima, stricken down by a mysterious illness, that reanimated his corpse.
ForgottenLuck1 votesNo, they did not, it is one of the most infuriating things in the world that Riot themselves in Amumus Bio. don't tell us what it is but rather that told us a mix of things he could be, one of which was a child prince, another is a cursed child, and another is a Yordle prince but they refuse to tell us anything solid to what he is. link to bio: http://universe.leagueoflegends.com/en_US/story/champion/amumu/ If you pick anything from this please tell me but it is really annoying how Riot themselves refuse to tell us,
BewitchingCougar1 votesIn game quotes support him being a yordle, most notably Reworked Poppy, but besides that, Amumu's lore was always purposefully mysterious. I don't think we'll ever learn what he is for sure, and while I get wanting to be sure, I personally like it. Wouldn't mind a confirmation, but am content with the current lore + story
ForgottenLuck2 votesI completely disagree with you in not wanting to know what he is I think the current lore is not that good, just opening up possibilities with no biases and the not wanting to tell us what he is, it is poor writing in my eyes as it allows, little view into him.
As for the in-game talks and the art (notice he also shares many qualities as the Yordles, even having the four fingers) then why would Riot purposely not just say in his bio he is a Yordle, they hide it with rumors and stories passed down and refuse to tell us what he is. If he is just a Yordle why the secrecy? If he is a human why does he share so many Yordle qualities? I only wish for Riot to tell us something and not keep hi as an enigma.
It has even lead me to believe he is a mix of Human and Yordle being forbidden lovers yet when I once asked Riot on the views on relationships between species in Runtera they said that the idea for Human and Yordle to be together not really working out which kinda tempers a bit with this theory.
TheHappyReaperz1 votesThe most identify piece of what Amumu is, is the story that goes along with his Bio. In it, it described the tomb were Amumu originates, which has engravings of a child emperor, who died to a mysterious illness, the narrator describes Amumu as a child repeatedly, and the previous thoughts to what Amumu was, are stated by children at the end, discrediting them.
ForgottenLuck1 votesThough I have thought of this before, there is just one problem with this. Is that his Tomb? Stories of Amumu have already been told by that point so it is fair to say that he has traveled. The writing in the wall could simply be the view of the people in the temple views of what Amumu is as they might have heard of him and told his story like that.
This makes it difficult to trust his short story as we don't really have knowledge of how long have the stories of Amumu been there in comparison to the tomb and makes it difficult to say it's a reliable source. Plus to add to this matter, if they were simply going to tell what he was in his short story, why not just explain why he was in his bio. that were released the same day?
TheHappyReaperz1 votesThe tomb is described as "The Tomb of Amumu", so I would assume that it is. Plus, it is the place he was released from, so it makes sense that it would be his tomb.
ForgottenLuck1 votesYes but the one who says's that is the Shuriman that found it, the same one who talks with the children about not knowing what Amumu is. As they are constantly arguing if he is human or Yordle.
Unless you believe I am saying that Amumu is not royalty, cause if you believe that is what my words are pushing towards then I apologize for the misunderstanding as to how I am not pushing that, the fact that he was royalty is not something I am arguing toward but more if he is Human or Yordle, which again is not stated in his short story.
Ebonmaw Dragon1 votesNo, they did not, it is one of the most infuriating things in the world that Riot themselves in Amumus Bio. don't tell us what it is but rather that told us a mix of things he could be, one of which was a child prince, another is a cursed child, and another is a Yordle prince but they refuse to tell us anything solid to what he is. link to bio: http://universe.leagueoflegends.com/en_US/story/champion/amumu/ If you pick anything from this please tell me but it is really annoying how Riot themselves refuse to tell us,
Fun Fact about Yordles: They are seen by humans as humans, however, it seems that childs can see the yordles as yordles.
With that in mind, read his lore again.
ForgottenLuck1 votesNow I know this yet it this still leads to many mysteries such as how Yordles work nowadays.
For example, I don't think it was a coincidence that in the Piltover lore update we didn't get to see 
and 
, two champions that before the retcon where located in Piltover, leaving their current location an enigma.
As for the reasoning that the child can view Yordles easier than adults is caused, if I remember correctly, is cause they are closer to magic and no? That's why champs like 
and 
, two former humans that have been too close to magic it changed them can see them. (please correct me if I am mistaken for I found this out in a Riot Ask, and that was a bit ago), this would mean not all adults don't necessarily see them just those that distance themselves from magic.
There is also the fact that Adults don't necessarily believe they don't exist just think they are rare, as in the Vastayan journal the writer said he would look for them after, meaning they are known but the populace is divided on if they exist or not.
And last, though they are seen as Human by Adults I don't really see how that helps my reading of the Bio. and short story as for the Bio, it ain't really a Runeterran telling us but it's basically Riot telling us they don't know. The short story we are in the eyes of a tomb raider that just found Amumu, but he also does not know what he is.
Valor Bot1 votesWeren't Amumu's splash arts edited to have four fingers along with the rest of the yordles? Basically confirming he's a yordle? (Could be wrong, I'm not remembering.)
TheHappyReaperz1 votesNo, it was the official yordles, can't find any on Amumu.
Chembaron Yamada1 votesHow about Rammus? Yes, no, ok?
Sharjo1 votesRammus is whatever the hell he wants to be.
Chembaron Yamada1 votesKnew it, Rammus is the Skaarl of Shurima, a spirit of the land.
Alright.
Glîtchy1 votesApparently he and Nami are officially Vastayan
ForgottenLuck1 votesI know Nami is now Vastayan but I have not really heard about Fizz are you sure he is also counted as one?
Glîtchy1 votesI know Nami is now Vastayan but I have not really heard about Fizz are you sure he is also counted as one?
I have been told by numerous people that he is one, when you think about it though, it makes sense as Vastaya are basically chimera and Fizz looks to be a Cephalopod mixed with an amphibian of sorts
Sharjo10 votesI can say with absolute certainty that he's not vastayan.
ForgottenLuck1 votesThough I am not doubting you that he might become one in the lore letter on I have yet to read so in the lore as of this moment, I don't even think shares quotes about Vastaya with Fizz.
Ebonmaw Dragon1 votesHe is a character of the game.
ForgottenLuck1 votesHmmm, fair answer I thought he was more a disease though
BewitchingCougar1 votesHe is not a Yordle, at least wasn't before the new lore (source here and here). Keep in mind his lore has yet to be updated, though I think League no longer existed when it was released, it is really short compared to the new lores, so it will probably be reworked eventually. I've seen talk about Tahm Kench's unique taunt implying he was the cause of Fizz' people vanishing, but idk.
Personally, he looks to different to be a Vastayan, so I would bet on being another, not yet revealed race.
XIII Vanitas1 votesHe's something that Riot will eventually figure out, once they get around magical sea creatures or yordles once again.