Not all of them are QUITE as insane as this above Meowth one, but many are still very odd. Mentions of death, smoking, drinking, what feels like political propaganda, and some that are very rude & condescending. I don't know who the father asked to write this stuff? It can't just be kids, there feels like some info here has a propaganda agenda.
So, after having watched the entire video, just want to more focus and re-analyze my initial thoughts.
First off, my comments of political propaganda? I think they're completely off the mark. After reading some of the Youtube comments from Russian commenters, the strangeness isn't propaganda but more social commentary of Russian society and world views.
The hate for journalists permeating throughout the entries? Basically all Russian "journalists" who have any notoriety work directly for either the government or the
Oligarchs, a group of super rich businessmen who took advantage of the collapse of the Soviet Union and purchased most of the state assets (this includes things like public property, land, buildings & other infrastructure). Either you write what they tell you to, or you do not have a career (and may also possibly "disappear"). In fact, the Meowth one that was spread around is actually sounding like they're a commentary on the Oligarchs. So, in a way, the entries that are anti-journalist are actually anti-propaganda as that's what Russian journalists are mainly only allowed to write.
Another theme I noticed is that quite a few have Pokemon essentially taking on what sounds like certain stereotypes of homeless, low class, and impoverish people. Like people who you'd either see or encounter while walking down the street or "that homeless/poor guy" who hangs around the neighborhood. I'm curious why he gave certain Pokemon the stereotype he did, was it just that he was working on the Pokemon's dex entry when he remembered the stereotype or was it something about the Pokemon, be it from its appearance or description given, that reminded him of them.
There's also a few cases where I'm curious if the anime may have influenced what he heard. As I said, he likely asked a batch of kids about the Pokemon so those kids bias would influence what was written (like the Bulbasaur family entries, I would not be surprised if he's so down on it because most kids think Bulbasaur "stinks"; the kids mean as a Starter choice compared to the fire dragon and turtle with cannons, but the father may have taken it literal as it smells bad (not sure if the pun works in Russian, but I think the scenario works out)). Now since the kids likely couldn't understand what was written, when it came to Pokemon behavior it may have been how the anime portrayed them that molded their image. For example, Diglett blowing up cars with annoying car alarms. I recall back to the Diglett (and Dugtrio) episode of the anime where the plot was the Diglett family was hampering construction of a dam to prevent their home from being flooded. What did they do to hamper construction? They wrecked the trucks and construction vehicles. Now in the episode they did so by digging holes, but that little detail may not be obvious for a kid to mention to an adult inquiring about the Pokemon: "Diglett destroys vehicles which they don't like"; and from there the father filled in the blanks.
I wonder if that, In an odd way, writing these dex entries may have been sorta stress relieving for the father. So many social issues are on display, maybe things the father wanted to get off his chest but couldn't outright without fear of punishment or ridicule. By disguising his woes and observations with these fantasy creatures, he's able to get out these stereotypes (exaggerate them even) without fear for himself or his family. In addition, he gives his daughter and friends (and later other Russiand kids) both entertainment but also glimpses of "real life".
Sadly the father and the illustrator he hired passed away several years ago (additionally sad is there seems to be lost work) so we'll never know the full story. But for Russian kids it gave them a way to have some more fun with Pokemon (and I guess learn about what's going on in their country) and, now, a two hour video astonishing people around the world. Not a bad legacy to leave behind, so a shot of vodka for you Mr. Alexander Zhitinsky; wherever you are let there be no journalists.