I initially only cared about covering the main, proper Godzilla series, which is the 33 films produced by Toho. However, as I focused in on having the information presented be consistent and focused on the primary sources, I've repeatedly bumped up against the main series pointing or connecting to sources outside of the main series which I've handled by simply not handling them. However, I've officially reached the point where it's interferring with what I'm attempting to do with this site to ignore this stuff, and so I've got to account for it somehow. To that end, this page will cover all source which are not part of the Godzilla series proper, but are somehow related to the continuity and world building of the series.
So to be clear here, this is not going to be a page that exhaustively covers every single licensed novel, comic, TV show, video game, etc. in the entire franchise. That would be mostly pointless since we live in the age of wikis now and that information is redundantly available already. It's only sources that are directly relevant to the timelines seen in the main series. As far as what counts there, that's a fuzzier line to draw. For some things it's easy, like the prequel novels, the Uenishi shorts, and Zone Fighter. Once you start wading into the minefield of licensed media, of course, things start to get fuzzy, which is always the case for large corporate franchises. Legally speaking, licensed material general only carries the IP in a general sense, and rarely is in a situation where they can definitively say "this is happening in the same world as the main media series you're used to for this IP." It then usually becomes a question of retcons and authorial intent. Did the author of the licensed work intend for it to connect back to the main series? If so, do later works in that series undo the connective tissue between the stories? This is especially difficult with corporate media because of the added dimension of marketing and the capitalist takeover of "canon," which I could scream about all day but this isn't really the place.
My point is with all this, that as with all art, corporate or not, the audience is always going to be the final arbitor in any question regarding stories. These are, of course, just stories, and there is no objective truth to them whatsoever. My criteria for what does and doesn't fold into the main Godzilla series may not match yours, but that's just the way things have to be when dealing with art. At the end of the day, my opinions and interpretations are my own and the only person I really have to answer to is myself. That said, for each page below, I'll include my own justification for why I've decided to use each work as a source for - and this is the kicker here - the purposes of fleshing out the information provided on the other pages. Because, again, my ultimate goal is not to have an exhaustive list of everything Godzilla's ever been in, but rather create a picture focused completely around the core, primary Godzilla series of 33 films.
As for material without Godzilla actually in it, that's kind of a different question. I'll obviously be dealing with it when its relevant, since I've kind of passed the point of no return there, but whether I'll have pages for those sources or the monsters in them which never appear in the Godzilla series, I don't know. I guess it would make sense for me to have a page aboot, say, the original Gezora, if I'm going to have a page featuring the version from the prequel novels, but does that also justify making a page for every monster in the SJHU? Does my Godzilla webzone really need 6 pages devoted to Ultra Q monsters? I mean, I wouldn't mind making them, crossovers are awesome, but at a certain point aren't I kind of losing the plot? So, for now, my priority is just to finish what I've started, and if at some time after that I decide to get more into detail aboot, say, why I think Gunhed actually takes place in the VS-2 timeline's future? Then I'll do it.
1983 Mechaghidorah versus Godzilla - Short Illustrated Article
1990 Strange Tale of Genroku Era Odo Island - Chapter of The Godzilla Comic
2017 Godzilla: Monster Apocalypse - First Anime Trilogy Prequel Novel
2018 Godzilla: Project Mechagodzilla - Second Anime Trilogy Prequel Novel
1973 Zone Fighter - 26 Episode Television Series
2019 Godzilla vs. Evangelion - Universal Studios Japan Ride Film
2021 Godzilla the Ride - Seibuen Amusement Park Ride Film
2022 Godzilla vs. Gigan Rex - G-Fes Animated Short Film
2023 Godzilla vs. Megalon - G-Fes Animated Short Film