I don't like responding to suspect discussions when I don't plan on actually participating in the suspect myself (which I don't, not only for a lack of time but also because I'm genuinely completely on the fence for the Pokemon being suspected), but the more I read this post, the more it annoys me. The whole point of this thread is to present arguments to convince people who are undecided to vote one way or another, and posts like this just don't do that. At a glance, this seems like an informed post (it even has calcs!) but when you actually read it and consider the points being made for more than a few seconds, you realize that it's pretty much completely pointless and tells you nothing that you couldn't figure out on your own by reading Walking Wake's Bulbapedia page. Let's take a closer look.
First, great offensive and defensive typing. Water/Dragon has the ability to hit almost every type combo neutrally, only things really stopping it would something such as an Azumarill , Water Absorb Clodsire, and even an opposing Walking Wake.
Well, first of all, Walking Wake doesn't resist Water/Dragon, it is in fact weak to Dragon. But I'll assume that's an honest mistake, that's not even really the problem here. The problem here is that precisely zero people who are capable of getting suspect reqs don't already know why Water/Dragon is good typing. This is going to be a common theme going forward.
Both Sun and Rain teams have taken advantage of this new prehistoric beast with the new Hydro Steam move, ripping big holes into teams with the lack of much Water resists, and many counters To WW dont want to switch into a boosted Hydro Steam.
Yes, it's good in both weathers. Literally anyone who takes a cursory look at its movepool and abilities can figure that out on their own; you'll notice the group of people who can make suspect reqs is entirely contained within that former group. You also say that counters to Wake don't want to switch in on boosted Hydro Steams; judging by this and the calcs you provide, you seem to be confusing checks with counters. Again, not really the main issue here but just something I wanted to point out.
Iron Valiant does not counter Walking Wake. Iron Valiant
checks Walking Wake. In most circumstances, if Valiant is given a free switch, it will beat Wake, however, it cannot safely switch in on Wake. This makes it a check, not a counter. Blissey would be an example of a counter to Wake; barring some absurd set like RestTalk or Dragon Dance, Blissey can switch into anything Wake carries and cripple it with Thunder Wave or chip it down with Seismic Toss.
Also OHKOing something with 74/60 special bulk is not exactly an impressive calc.
Walking Wake doesn't even need Sun or Rain to be good. Being a Paradox Pokemon, it's stats are already very good, having a speed tier of over 100 make the base 125 SpA work hand and hand together. With that speed, not really anything going to be outspeeding it. The ones that do are either weak to WW or you have to sacrifice a Pokemon to get it on the field. And that's not even saying it can boost that speed with a Booster Energy or Choice Scarf! (Not sure why you'd run Scarf WW but it's an example)
I feel like this is the closest you get to making a salient point and I still hate it because you still dropped the ball. Maybe just a personal pet peeve of mine but the fact that it's a Paradox Pokemon is completely irrelevant, don't even bring it up. It's the same thing as bringing up that a Pokemon is a legendary or an ultra beast or whatever; a complete non-sequitur. Competitively that means nothing. 109 base Speed and 125 base Sp. Atk aren't exactly all that impressive on their own either; if stats like that make it banworthy, when are we suspecting Iron Moth, or Gengar? Do you really think there's a single person who sat down, read your post, and said "oh shit, I didn't realize Wake has 125 base Sp. Atk", then goes on to make suspect reqs and vote ban because of that?
It's true that this Pokemon is difficult to outspeed when it's getting a Speed boost from Protosynthesis (and this is why I say this is the closest you've come to making an actual point; the fact that this Pokemon has little reliable offensive counterplay when in its element is something that should be emphasized in any pro-ban argument), but right at the beginning of this paragraph you seem to indicate that you're talking about using it outside of weather teams, an observation further supported by you mentioning Booster Energy (a pointless item if you're providing it with sun support) at the end of the paragraph. It's also true that offensive teams often need to either play very aggressively or sac something to revengekill Walking Wake... in the sun.
Another problem is that you're way too vague here. You say few things outspeed it and you often need to sac something to get a revengekiller in, but is not that true of a ton of other offensive Pokemon as well? It certainly is for Iron Valiant, Dragonite, Volcarona, Roaring Moon... What sets Wake apart from these Pokemon?
Many other people are making similar arguments as mine.
This is, unfortunately, the truth. There are a ton of frankly bad arguments being thrown around in this thread, this is just the one that caught the worst of my ire. While there have been some good posts that discuss more subtle topics like Wake's impact on the metagame, counterplay (or a perceived lack thereof) to Wake, whether Wake itself is banworthy or just a symptom of a larger problem, and how one goes about playing around Wake and the difficulties thereof, there has also been a ton of people saying "Walking Wake should be banned because it has good stats and typing" or similarly flaccid arguments.
When you post in suspect threads, please don't just list random facts about the Pokemon that you would get from reading its Smogon analysis or Bulbapedia page or whatever. Literally every single person who's going to participate in the suspect already knows this information. Most of that information is included in the OP of the suspect thread. Everyone has at least a basic idea of what this Pokemon does; nobody needs to know that it's kind of scary in the sun, or that it has good typing. Explain why that's a problem. Explain the impact Wake has had on the metagame and why that's a bad thing. Explain why the counterplay to Wake isn't sufficient (you need to be more specific than saying not much outspeeds it and it OHKO's a Pokemon with 74/60 special bulk). If you really want to go all in, grab some replays from the higher ladder or tour games to support your arguments. For most suspects usage statistics can have some value as well; this is unfortunately not the case with Wake as it was suspected so quickly after its release.
It's frankly patronizing to throw obvious information at us like we didn't already know that or like it's going to convince anyone one way or another. Precisely zero people on this website read a post like this, change their mind because of it, and then go on to make suspect reqs.