Bakan/Bagan

These are based on concept made by Toho for a some monsters Godzilla and Mothra almost fought, but ended up being left on the cutting room floor

That's A Lot of Fish

Made a fake retrosaur for a design challenge.

The Marine Iguanodon or Rynchotitan 

A (previously thought to be) extinct species of gigantic fossil reptile belonging to the retrosaurian family, somewhat similar to iguanodon creatures previously classified. Its fossils discovered in late Cretaceous formations, this species is hypothesized to have lived throughout the South Pacific Ocean on landmasses such as New Guinea, New Zealand, and French Polynesia. A chance discovery by a submersible of partially uncovered remains within ocean sediment has lead paleontologists to surmise that this particular kind of retrosaur was aquatic. 

This was at least partially confirmed in the late 20th century when a colossal and severely mutated individual of this species apparently swam from the southern Pacific, trekked across Panama, swam through the Atlantic and made landfall on Manhattan island. The reason for this bizarre journey is unknown, thought it’s believed to be some exaggerated form of migration instinct amplified and altered by its mutation. 

It wasn’t too bad, really. At least, it wasn’t a ~huge~ disaster. It was kind of like having a moose in your driveway, a little scary, but it can be weathered with a bit of patience. Only on a city-sized scale, of course.

Eco Caterpillar

Battra Larva work in progress

Titano-lisk

Titanosaurus 1998, as a mutated basilisk lizard. Again, mutated due to atomic testing in French Polynesia ala American Godzilla 1998, as well as my takes on American Baragon and Anguirus.

Why were so many varied species of lizard located on French Polynesia? In a world where radiation can turn animals into giant superbeasts, maybe they French where experimenting with mutation. Maybe they had a think tank on the islands that included studying alternate forms of energy and a reptile house of exotic reptiles, and the two meeting was an accident. Who knows?

Anyways, Titanosaurus migrates to the waters off the coasts of India and Japan, decreasing fish populations and spooking ships, creating a rumor of "a giant goldfish" attacking fishing ships. Designed to be an analog of Godzilla, with a bit more hadrosaur elements.

Manda-Stropheus

Manda as a Tanystropheus.

Can't say that Manda's long/chinese dragon design was not as impressive when placed in the same setting as Godzilla or Ghidorah. I felt like tanystropheus was a nice fit. Serpentine, aquatice, reptillian, toothy.

The neck was originally going to be a lot longer, but it didn't sit right with me.

Baragon's Kids

So after being used for Frankenstein Conquers the World, the Baragon suit was used to make the monsters Pagos, Neronga, Gabora, and Magura for the Ultraman series. So it’s a little bit like he has descendants. Sea Baragon and 2001 Baragon are thrown in for good measure.

Godzilla-Raptor

Godzilla as a Dromaeosaur 

Don't get me wrong, feathers are an important part of depicting any kind of raptor, and most theropod dinosaurs. I just like the idea that being mutated by an atomic blast burned all his feathers off and they grew back sparsely and in weird ways.

Almost didn't do this one, on account of a Godzilla with raptor features could just end up being Zilla/Gino/Godzilla1998. Adding Godzilla's distinctive low center of gravity as well as (hopefully) appropriately positioned raptor arms helped move it along.

Anguirus 1998

American Anguirus

Anguirus as a mutated Red Eyed Crocodile Skink, mutated by atomic testing in French Polynesia, ala Zilla and Baragon 1998. I'll leave it up to you to figure so many exotic lizard species were affected by it.

In 1998 American Godzilla movie, Godzilla's name is depicted as a mispronunciation of the original name Gojira, which in the film's world is derived from a Japanese "mythological sea dragon that filled their hearts with fear". This certainly was meant to be some filler text to justify the movie's title name, and, but what if there was more to it? What if in the movie's setting it's part of an international disinformation campaign to cover-up an occurrence in 1954 Japan, the events of the original Godzilla movie? Or what if in this world Godzilla and all associated monsters are actually elements of east Asian mythology, with Gojira literally being a dragon/lóng? What if they weren't just myths?

Anyways, the idea is that this Anguirus got his name because he's buddies with Zilla Junior, and in the myth, Gojira's ally had the same name.

Plateo-Zilla

Godzilla as a Plateosaur.

One idea I've read is that Godzilla might be derived from some sort of carnivorous or omnivorous plateosaur, sort of like the inverse of therizinosaurs. An interesting idea.

I was surprised to learn while researching for this that prosauropods aren't really a scientifically classified clade anymore. They've been absorbed into the sauropodomorph suborder.

Anguiro-suchus

Anguirus as an Aetosaur

Originally based upon Desmatosuchus, which features of Riobarrisuchus/Heliocanthus, which might all by synonyms for the same creature anyways.

Cephalo-Zilla

Godzilla as a pacheycephalosaur. Godzilla is ostensibly a theropod dinosaur in some of the movies, so I thought it would be a nice exercise to apply Godzilla features of other families of dinosaurs.

Lystrosaurus baragonsis

Baragon as a dicynodont, specifically a lystrosaur. I feel like it fits.

A Baragon By Any Other Name

I like the idea of reinterpreting Godzilla monsters using the 1998 Godzilla/GINO/Zilla design rationale as a basis. No dinosaurs, no prehistoric beasts, no magic, everything is basically a giant mutated creature. As an iguana mutated and became Godzilla, a frilled lizard mutated and became Baragon, who first appeared in Frankenstein Conquers the World (incidentally, one of my favorite movies).

This originally started out as an excuse to draw a folded up frilled lizard frill, before I thought that the frill could be a stand in for a redesigned Baragon's ear flaps.