#140 - Kabuto
Rock/Water
Kabuto is the other Generation I Rock/Water Fossil revived from the Dome Fossil, and it seems to me the most popular due to a cooler design and evolution---although perhaps Omanyte might win out nowadays thanks to the Helix Fossil meme. Both Pokemon are the same Type, so picking between one ultimately likely came up to simply which design you liked the most, as during the main adventure they'd basically end up serving the same "Water Pokemon" role on your team if you hadn't added a Water-type Pokemon already at that point. Personally, for me, I try to avoid re-using Types when I'm playing through the main adventure when it comes to team construction, but others might not be so strict and might use multiple Water-type Pokemon or, heck, a whole team of them since they're so plentiful.
Kabuto appears to be a combination of two similar animals---the extinct trilobite and its closest extant ancestor, the horseshoe crab. It's similar to Omanyte in this way who also appears to draw from two animals as well, one extinct, one extant, and like the ammonite the trilobite is considered a very important fossil due to its prolificness and use in the fossil record, and like the nautilus the horseshoe crab is considered to be a "living fossil". Thus there's actually a great sense of symmetry between the two Pokemon, and while some folks may find it odd Game Freak went with odder ancient animals over the more popular dinosaurs, it's clear they actually put a lot of thought into what choices they made to represent the debut Fossil Pokemon. Kabuto in the lore is said to be an ancient creature, yet it also lives up to the "living fossil" idea because it's said living specimens have been discovered, although the games have never actually had it appear in the wild to back this up.
The body of Kabuto---who is named after the iconic Japanese helmet---basically resembles the shelled head of the trilobite/horseshoe crab, a very simplistic version that leaves off the rest of the real creature's body. Like many Generation I Pokemon, its shadowy bottom is basically meant to represent the "unknown" insides of the shell, the only thing visible being two glowing red eyes. If you only knew Kabuto from playing Red and Blue and never saw it otherwise, you wouldn't have even seen those eyes as the sprite used in those games only showed the top of its head. There's a misconception that the small black eyes on Kabuto's top are fake eyes, and the red eyes are its real eyes, but that's not correct---according to the PokeDex, the eyes on top are indeed actual eyes, whereas the red eyes also seem to be eyes. Going by what we know about the horseshoe crab, it actually has multiple eyes on the top of its head, but the two visible ones are complex eyes whereas it also has light-sensing eyes on the underside of its shell as well, which Kabuto thus represents. To my understanding, the horseshoe crab doesn't use its top eyes for much other than mating, and the light-sensing eyes prove more useful when navigating the ocean. But it's another complex creature who is hard to really learn about without studying the basics of arthropods so forgive the rudimentary and possibly inaccurate scientific explanation.
I really like Kabuto's design, while not as cute as Omanyte its appearance which brings to mind a Java from Star Wars, or some kind of strange hooded monk, is effectively creepy and a nice way to represent that it's a creature from basically another world. I haven't seen any "real-world" interpretations of this Pokemon really in fan-art, which is a surprise since the creatures it's based on are extremely bizarre and creepy looking in real life and influenced the designs of the "Aliens" franchise if I recall. Game Freak I think made a good choice leaving the underside up to the viewer's imagination as opposed to drawing it out, which I think would remove the aesthetically pleasing simplicity of the design. You never really realize how often they pulled the "use black to represent unknown space" trick till you look at the Pokemon closely, but that's probably because they do it so well in Generation I that you never really notice it till you look and the design feels complete even with all the details left out.
Like Omanyte, Kabuto has made appearances alongside the other Fossil Pokemon, but got a debut episode in Orange Islands where a bunch of dormant Kabuto were basically serving as the foundation of an entire island. The episode was suitably creepy, with all the Kabuto coming alive at the end at the signal of a blood moon and causing the entire island to instantly sink into the sea. You know, Orange Islands were kind of stupid in parts (Orange Gym Leaders sucked, and half of them wanted to sleep with Misty for some reason), but it had some pretty neat little episodes like this one.
#141 - Kabutops
Rock/Water
Kabutops is the evolved form of Kabuto via Level Up, and probably the second most popular Fossil Pokemon due to its rather streamlined and intimidating appearance. I believe in the Generation I days, it was considered the best Fossil Pokemon due to its powerful Attack and decent Speed, but it's never really risen to the higher ranks, although it does occasionally see use in higher tiers due to working together with Rain-based teams alongside a certain Legendary Water-type Pokemon. Still though, I think a lot of people probably use it simply because of how it looks---it probably competes with Scyther for the title of "Most Badass Generation I Pokemon", proving that adding scythes to anything makes it far cooler. Seriously, imagine if Farfetch'd wielded a scythe instead of a leek, you wouldn't want to mess with that motherducker or he'd totally duck you up. I think Kabutops looks neat myself, yet I kind of like the weirder, less insta-cool Fossil Pokemon myself---my two favorite Fossil Pokemon are probably the two least liked.
While Kabuto represented merely the head segment of the trilobites, Kabutops includes the rest of the body such as the spiked-layered spine and tail, but also adds some other, more "saurian" elements like a bipedal body, and functional legs, and it's surprising how elaborate they made it compared to Omastar, who was a rather modest evolution who didn't stray too far from the base creature. But most probably like Kabutops for this reason because, hey, it looks cooler this way! Despite their names, horseshoe crabs aren't related to crabs, but are more like spiders and scorpions, thus you can see the scythes meant to represent that scorpion element perhaps, and also makes Kabutops slightly resemble the ancient "sea scorpions" known as eurypterids, although they actually aren't technically true scorpions. It's definitely a fantastical design, but has enough elements of real-life creatures combined in a rather sensible way that it doesn't feel too weird or bizarre, and if you didn't know better, you might think such a creature may have existed in the real world in prehistoric times.
Kabutops is said to be a skilled swimmer, yet I don't recall ever seeing it actually shown swimming in any media, and its body really doesn't look like it's specialized in aquatic movement, but apparently it can tuck in its body to increase its speed in the water. One interesting element the PokeDex also adds is that this Kabutops may not be the "original" Kabutops, and is actually a Kabutops in the middle of evolution as it began to slowly move to land-based movement over aquatic-based movement as its prey moved to land as well. and thus presumably the older Kabutops may have had a more aquatic-friendly design. Kabuto, and Kabutops by extension are said to have existed 300 million years in the past, which actually links it with a later Pokemon introduced in Generation V who is an ancient bug turned into a giant mecha. Well, we've never seen the actual non-mechanical form of said Pokemon, but it was said to be one of the top predators 300 million years ago, and thus many people speculate due to its similarities with Kabutops they may be one in the same---possibly the creature Kabutops became when it adjusted to land life. On the other hand, I also wonder if the other Pokemon actually hunted Kabutops, and was the cause of its extinction as despite being a powerful aquatic hunter, on land it couldn't measure up and thus was hunted to near extinction. But it's really hard to work together real-world evolution and Pokemon evolution, because sometimes it seems they work on entirely different levels---for example, Kabuto Evolves into Kabutops, yet the actual Kabuto never evolved and thus the modern one is virtually identical to the old one, yet Kabutops apparently did evolve and change its appearance over time. It's really messy, and that's ignoring the fact that I've never been that great when it comes to understanding evolutionary theory. But I'm positive the way Game Freak handles it doesn't really make much sense.
Kabutops has one of my favorite scenes in any Pokemon Movie. In Movie 5, there's a really awesome chase scene where Ash is chased through the canals of "Venice" (Pokemon Venice, though) by a Kabutops who is basically going at Ash like a ninja, and literally trying to cut the guy into pieces. It's a great scene and punctuated by a really great BGM---plus I love how the Pokemon who ultimately save Ash end up being Brock and Misty's Pokemon, actually doing something useful for once in their lives. I don't actually remember Kabutops ever having a starring role in the show, though, he always played second fiddle to our next Fossil Pokemon in all of his appearances.