#193 - Yanma
Bug/Flying
Yanma is another Bug/Flying Pokemon, and like the large majority of Pokemon who can claim that Typing, he's really not all that strong, especially in Gold and Silver. In Generation II, Yanma only learned two STAB moves, Leech Life through breeding and Wing Attack by Level Up ONLY in Crystal, and in general his move set straight up sucked. While he's gotten better over the years due to actually getting good moves and Speed Boost for an Ability, using one in the original Gold and Silver wasn't recommended, and if you wanted to use one because you liked the design, tough luck, because this is another Pokemon with a 1% appearance rate outside of Swarms. Yanma was at his best in Generation IV incidentally when his evolution came and made him basically obsolete, but at least now he's a fun member to use during the adventure in newer games. Once more, a lot of weak, "pointless" Generation II Pokemon I actually like despite that fact---though I actually took a liking to Yanma far more once his awesome evolution happened in Generation IV.
Yanma's name is literally Japanese for "large dragonfly", and actually a shortening of his original Japanese name, "Yanyanma". I'm not sure if the extra "yan" really means anything or if the name is basically equivalent to our "Lickilicky", but it's another name change which seems kind of odd---why switch out one Japanese name for another? Yanma is a dragonfly, specifically Bulbapedia says the "red-veined darter" due to its coloring and the red markings on its wings, but I can't say for certainty if they're right since I'm not an etymologist. While the west associated dragonflies with, well, dragons, that doesn't seem to be present in the Japanese view of them, though they are important to the Japanese as cultural icons. In fact, one of the ancient names for Japan, Akitsushima, can be interpreted as meaning "dragonfly island", and it's said this is due to an ancient legend involving a dragonfly eating a mosquito who bit Japan's mythical founder, Emperor Jinmu. In the western world dragonflies have been associated with evil, specifically being linked to the devil due to their believed connection with snakes, but in Japan they're seen as representing Autumn and representing positive values such as courage and strength.
The two main elements of Yanma are its large eyes and its clear wings. It kind of weirds me out when I realize I've been looking at Yanma incorrectly and that green portion of his face isn't actually his head, but rather are his eyes and he's basically wearing green goggles---his head is actually red like the rest of his body. Like a real dragonfly, Yanma's eyes are super powerful and capable of seeing 360 degrees, making it a capable hunter and represented by one of its Abilities Compound Eyes which boosts the accuracy of moves. Yanma's clear wings allow it to move at great speeds, quickly changing direction on a dime, and flap so fast they can even generate shock waves causing glass to completely shatter. The sprites in the games actually do a pretty good job at making the wings appear transparent despite the graphical limitations, though other appearances tend to make them solid white, especially the show, but I imagine animating transparent wings is a pretty difficult task so I can't blame the animators for taking some liberties with its appearance. In addition to being a dragonfly, Yanma also seems to slightly resemble an old-school plane with its striped main wings and little tail wings, and its eyes could be seen as resembling aviator goggles.
Yanma's debut episode lived up to its claim of being able to shatter windows with its wings. Years later in Diamond and Pearl, Jessie ended up capturing one (by throwing a PokeBall at it after a kid had weakened it for her), and tried to send it to Giovanni as a gift, who had no use for it, so he sent it back to her. In its first battle under her control in that very episode, it happened to evolve due to knowing Ancient Power.
#469 - Yanmega
Bug/Flying
In Generation IV, a Yanma who learns Ancient Power and evolves becomes Yanmega. In Japan, it's known as "Megayanma", thus the first ever Mega Pokemon---well, not really, though it does sort of have that extreme overhaul and intimidating presence you might see in a Mega Pokemon. Little Yanma was never that strong but Yanmega makes up for that with all around great stats (though its Speed actually doesn't get any better, though it's decent) and the awesome Abilities Speed Boost, meaning it will soon become faster than any Pokemon almost if it can survive long enough, and Tinted Lens, which doubles the power of ineffective moves, meaning at worst you'll hit a dual-type Pokemon with a half-damage attack instead of a quarter-damage attack. Despite all this, Yanmega isn't totally invincible due to the fact Bug/Flying is a really shitty Type and prime Stealth Rock bait, not to mention weaknesses to Flying, Fire, Electric, and Ice. But it's a great asset during the main adventure now (if you can get Yanma first), and a really awesome Pokemon that made me like its original form much better in retrospect, and it's another Gen IV evolution I consider to be quite natural feeling despite having a more "unnatural" evolution method.
Like Tangrowth, Yanma evolves when it learns Ancient Power, and thus it can be said Yanmega is a Yanma who awakened ancient DNA buried deep within its genes. The "mega" part of the name isn't as dumb and uncreative as you might think, as it's derived directly from the extinct dragonfly relative the Meganeura, though the pun is more obvious with the original order of the Japanese name. Its color-scheme and general appearance also resembles that of the extant green darner dragonfly, one of the largest living members of the dragonfly family. The Meganeura wasn't technically a giant bug, as its body was actually smaller than various living beetles, but its wing-span was enormous at 25.6 inches thus giving the impression it was much larger than it really was---Yanmega on the other hand truly is gigantic at 6'03", the largest Bug-type Pokemon till Generation V happened. It's so big that it's said it can carry an adult male on its back, though it can't actually learn Fly. No one quite knows how or why the Meganeura grew so big, but a common, yet debated, theory involves the idea that Earth at one time in the past had a higher oxygen level making it capable for insects to grow larger, but this theory isn't accepted among many scientists it seems, though recently it seems to have gained more support. I'm not a scientist, but as a "normal guy" that explanation doesn't sound that far fetched to me and maybe one day we'll finally have a solid answer.
Yanmega is the RULES OF NATURE Pokemon. If you could say Yanma was a classic plane, Yanmega has basically turned into a fighter plane, with wings so large that when it takes off, it knocks over trees, and by flapping them it can destroy the internal organs of its opponent. Its main method of predation is quickly flying by the opponent and ripping their head off with its teeth, which is totally bad ass. This is the first Cross-Generation Generation IV evolution that I can't really find anything bad about in terms of design, it's pretty much perfect as an evolution to Yanma, and as a Pokemon in-and-of-itself. It's a big reason why I really love the new evolutions introduced in Generation IV.
Jessie's Yanma evolved into Yanmega in the episode it was captured in, and became a major force on Team Rocket's squad, probably their most powerful Pokemon ever, though it of course still lost due to being a bad guy. It became Jessie's go-to Contest Pokemon as well, replacing another Bug-type Pokemon she released during Diamond and Pearl who she had had since Hoenn, and perhaps fitting the sort of sexist ideals pushed by Pokemon Contests was explicitly revealed to be a female too. Yanmega was dropped during the switch to Best Wishes, because "it'd stand out as a non-Unova native", and has yet to be seen again. Honestly I'm hoping one day in XY Team Rocket just call in all of their Diamond and Pearl Pokemon when shit gets real because they were all pretty great.