Hey there, everyone. In the off chance this thread sees a sudden increase in popularity, I can help explain the reason why. Basically, I wanted to make my own thread about a very similar topic, but only just realized after it went live that I probably should have just posted here instead. The full details can be found on my own thread, but for now I'll just get back to actually posting.
There's a lot of Pokémon on that list, but they actually all have something in common. Can you guess what it is? If you guessed that they all had locations named after or inspired by them, you were right. A select few of these, moreso in earlier Generations, are actually from spin-off games as a matter of fact. For the purpose of this specific thread, I'd like to primarily focus on four of those 10 Pokémon, being Bellsprout, Slowpoke, Zubat, and Alolan Diglett.
Let's start with Bellsprout and Slowpoke and then go in order for the others. These two each have their own little place in the Johto region, being the Sprout Tower and the Slowpoke Well respectively. Despite both being Kanto-native Pokémon, each of them was more prominently featured in various elements of the games. Bellsprout was notably no longer a version exclusive Pokémon like it was in RBY and not only appeared earlier in the game than its old counterpart Oddish (which had since gone off to do its own thing with its new evolution into Bellossom) but was also used by many more NPCs than the Oddish family was from what I can remember. The Sprout Tower actually becomes a required area to visit iun HeartGold & SoulSilver, and to top this list off, even Erika's still repping that Victreebel of hers in the Kanto-based postgame of GSC and the remakes, even going as far as to make Bellossom her ace in those specific Gym battles instead of Vileplume. Slowpoke is also not a version exclusive anymore in GSC, and got a brand new split evolution of its own in the form of Slowking. Alongside the new, obscure "SlowpokeTail" item available exclusively in the Generation 2 games, the new Elite 4 member Will also uses a Slowbro on his team
which in my opinion he should have had Slowking instead since it was new or maybe both of the same team but whatever. Finally, the Slowpoke family is also used by more NPCs in GSC/HGSS than it was in RBY/FRLG, again from what I'm able to remember.
Next up on the list is Zubat, specifically in Generation 6 and Kalos. The area that comes to mind isn't quite as obvious as some of the others I'll be going over. The "Connecting Cave" nearby Route 8 in the Kalos region is also referred to as the "Zubat Roost", believe it or not. Admittedly, since Zubat is featured so much in almost every game outside of Black & White 1 and Sword & Shield's base game (that is, no DLC packs), there isn't too much standing out for Zubat to do in Kalos. For what it's worth though, Zubat
did get a new psuedo-clone this Generation in the form of Noibat, and the Poison/Flying type combination
did receive some pretty excellent buffs in Gen 6, including a positive matchup against the new Fairy-Types, the buff to Defog helping with Stealth Rock, and actually being available in the first place unlike in the base games of the previous Generation. There's also just as many NPCs who like to spam this Pokémon as in other games, just to be safe.
Finally, we have Diglett in Generation 7 and Alola. This one is pretty self explanatory given Diglett's Alolan form and the two regions that are featured in Generation 7 games, being- you guessed it- Alola and Kanto. The Diglett's Tunnel in Alola is essentially just Diglett's Cave 2.0, and Gen 7 Alola was also the Generation where Diglett's evolution line received more buffs for the first time since the last Kanto games at the time, being FireRed & LeafGreen. This section is pretty short
just like Diglett's height because I'd rather not state the obvious over and over again.