so I did a run with Weedle / Yanma / Shuckle / Swinub. And yes, I do need therapy, thank you for asking
I will keep analyses short, since most of my nominations are gonna be fairly obvious
Weedle
I guess this could go in D-tier since it's not as useless as you may think. It's decent for Bugsy if you teach it Swift and somehowly wasn't useless at the E4, where it took out 3/5 of Will and Bruno's teams, while also contributing elsewhere with STAB Sludge Bomb. I don't think this is worth using, though, but it's certainly usable
Yanma
so this is very obviously an E-tier. Before the E4, it is rare for Yanma to take out more than one Pokemon because its only decent move until then is Headbutt. Also, it learns Wing Attack only in Crystal, so it's significantly worse in GS (since Wing Attack lets it get a few KOs at the League). Finally, this is either 1% encounter rate or requires swarms to make it common, both of which are just inefficient. I was aware this was gonna end in E-tier, I just wanted to see if I could make some use out of it for data purposes
Shuckle
Another obvious E-tier, the reason I used it was because I wanted to see if I could make the best of it. The only way to make this usable to any degree is with Hard Stone Rollout, which, surprisingly, allows it to hold its ground (somewhat) on the field. Granted, this is most likely due to the traded experience (I used the gift one) and I had to heal it quite often, though this also shows just how easy route cleaning is and why I don't care too much about it. In terms of major fights, Shuckle obviously provides no consistent solutions and even matchups like Pryce are a gamble when it comes to reliable sweeps, so easy E-tier
Swinub
I decided to apply my typical therapy™ for Pokemon lacking any real good moves and caught it in a Friend Ball, giving it Return and Blizzard immediately. Swinub is... terrible until evolution. It has a hard time killing most things and, when it does, it has to be healed after fights. Furthermore, Slow growth rate was just bleh when you want to evolve it ASAP; I had to use tons of skipped trainers + out of the way trainers (like the Union Cave ones) just to get it to Piloswine before the tunnel rival fight. It is okay with EQ, but it also relies heavily on Blizzard hitting to kill certain things
E-tier seems the best tier for Swinub, given the enormous investment and the unreliability it comes with.
===
I will probably do another run before I stop, since I think I've run with virtually everything (other than stuff like Smeargle and Ditto which are unusable)
I will keep analyses short, since most of my nominations are gonna be fairly obvious
Weedle
Beedrill
Falkner(12): you need 10 Fury Attacks to KO Pidgeotto, which 3HKOes with Gust (albeit it's slower). You could spam Harden on Pidgey before that to make the sweep safer
Bugsy(17): PB Swift 4HKOes Scyther, which 5HKOes with Fury Cutter. Set up Harden on Metapod or Kakuna if paranoid
Silver(18): beats Zubat and Bayleef
Whitney(20): five Fury Cutters end the fight. However, Miltank is faster and will typically KO you with two Stomps if you took enough damage from Clefairy, unless you spammed up Harden like a madman
Morty(25): I'd be surprised if you can even get past Gastly
Chuck(30): PBarb Sludge Bomb 2HKOes Primeape and 3HKOes Poliwrath, which goes for Mind Reader and Hypnosis. Surf 3HKOes you
Jasmine: nope
Pryce(31): beats Seel and Dewgong
Silver(33): beats Sneasel and Meganium
Clair(38): PBarb SBomb 2HKOes Dragonair. You take out two at best
Silver(40): beats Sneasel, Kadabra, and Meganium
Will(42): OHKOes Jynx and Exeggutor and 3HKOes Slowbro with Twineedle. Slowbro 2HKOes with Psychic, but generally goes for Amnesia turn one. Beedrill outspeeds all of them
Koga(42): nope
Bruno(42): beats the Hitmons
Karen(42): beats Vileplume and Murkrow
Falkner(12): you need 10 Fury Attacks to KO Pidgeotto, which 3HKOes with Gust (albeit it's slower). You could spam Harden on Pidgey before that to make the sweep safer
Bugsy(17): PB Swift 4HKOes Scyther, which 5HKOes with Fury Cutter. Set up Harden on Metapod or Kakuna if paranoid
Silver(18): beats Zubat and Bayleef
Whitney(20): five Fury Cutters end the fight. However, Miltank is faster and will typically KO you with two Stomps if you took enough damage from Clefairy, unless you spammed up Harden like a madman
Morty(25): I'd be surprised if you can even get past Gastly
Chuck(30): PBarb Sludge Bomb 2HKOes Primeape and 3HKOes Poliwrath, which goes for Mind Reader and Hypnosis. Surf 3HKOes you
Jasmine: nope
Pryce(31): beats Seel and Dewgong
Silver(33): beats Sneasel and Meganium
Clair(38): PBarb SBomb 2HKOes Dragonair. You take out two at best
Silver(40): beats Sneasel, Kadabra, and Meganium
Will(42): OHKOes Jynx and Exeggutor and 3HKOes Slowbro with Twineedle. Slowbro 2HKOes with Psychic, but generally goes for Amnesia turn one. Beedrill outspeeds all of them
Koga(42): nope
Bruno(42): beats the Hitmons
Karen(42): beats Vileplume and Murkrow
I guess this could go in D-tier since it's not as useless as you may think. It's decent for Bugsy if you teach it Swift and somehowly wasn't useless at the E4, where it took out 3/5 of Will and Bruno's teams, while also contributing elsewhere with STAB Sludge Bomb. I don't think this is worth using, though, but it's certainly usable
Yanma
Yanma
Whitney(20): gets steamrolled by Miltank. Even Double Team is unlikely to save you
Morty: when all you learn is Normal-type moves...
Chuck(29): PB Headbutt 3HKOes Primeape and deals nothing to Poliwrath. Double Team strategies are neutered by Mind Reader
Jasmine: nope
Pryce(31): beats Seel. You need Double Team to sweep
Silver(33): beats Sneasel
Clair(38): beats one Dragonair
Silver(40): beats Sneasel, Haunter, Kadabra, and Meganium with Sharp Beak Wing Attack
Will(42): beats Exeggutor
Koga(42): beats Ariados and Venomoth
Bruno(42): beats the Hitmons
Karen(42): beats Vileplume and Murkrow
Whitney(20): gets steamrolled by Miltank. Even Double Team is unlikely to save you
Morty: when all you learn is Normal-type moves...
Chuck(29): PB Headbutt 3HKOes Primeape and deals nothing to Poliwrath. Double Team strategies are neutered by Mind Reader
Jasmine: nope
Pryce(31): beats Seel. You need Double Team to sweep
Silver(33): beats Sneasel
Clair(38): beats one Dragonair
Silver(40): beats Sneasel, Haunter, Kadabra, and Meganium with Sharp Beak Wing Attack
Will(42): beats Exeggutor
Koga(42): beats Ariados and Venomoth
Bruno(42): beats the Hitmons
Karen(42): beats Vileplume and Murkrow
so this is very obviously an E-tier. Before the E4, it is rare for Yanma to take out more than one Pokemon because its only decent move until then is Headbutt. Also, it learns Wing Attack only in Crystal, so it's significantly worse in GS (since Wing Attack lets it get a few KOs at the League). Finally, this is either 1% encounter rate or requires swarms to make it common, both of which are just inefficient. I was aware this was gonna end in E-tier, I just wanted to see if I could make some use out of it for data purposes
Shuckle
Shuckle
Chuck(30): it is possible to muscle through Primeape with Hard Stone Rollout. Key word being possible
Jasmine: nope
Pryce(31): Hard Stone Rollout will OHKO everything only after hitting five times. You need luck to sweep. You can lock Piloswine into Mist to make set up safer
Silver(33): at best you can beat Sneasel and/or Golbat with lucky Rollouts
Clair(38): nope
Silver(40): read last Silver fight, but add Kadabra
Shuckle is useless for the entire E4, so not gonna bother writing those up
Chuck(30): it is possible to muscle through Primeape with Hard Stone Rollout. Key word being possible
Jasmine: nope
Pryce(31): Hard Stone Rollout will OHKO everything only after hitting five times. You need luck to sweep. You can lock Piloswine into Mist to make set up safer
Silver(33): at best you can beat Sneasel and/or Golbat with lucky Rollouts
Clair(38): nope
Silver(40): read last Silver fight, but add Kadabra
Shuckle is useless for the entire E4, so not gonna bother writing those up
Another obvious E-tier, the reason I used it was because I wanted to see if I could make the best of it. The only way to make this usable to any degree is with Hard Stone Rollout, which, surprisingly, allows it to hold its ground (somewhat) on the field. Granted, this is most likely due to the traded experience (I used the gift one) and I had to heal it quite often, though this also shows just how easy route cleaning is and why I don't care too much about it. In terms of major fights, Shuckle obviously provides no consistent solutions and even matchups like Pryce are a gamble when it comes to reliable sweeps, so easy E-tier
Swinub
Piloswine
Silver(33): NMI Blizzard OHKOes Golbat and Haunter and 2HKOes Meganium, which will generally 1v1 you. Sneasel is 2HKOed by Return
Clair(38): NMI Blizzard OHKOes Dragonair. You can barely live at red by the time you KOed all of those, assuming you never miss Blizzard
Silver(40): EQ and NMI Blizzard OHKO everything
Will(42): NMI Blizzard OHKOes Xatu and Exeggutor, while EQ OHKOes Jynx. You are fairly slow here, so expect hax
Koga(42): NMI Blizzard OHKOes Crobat on rolls. EQ OHKOes Muk, 3HKOes Forry, and 2HKOes Ariados/Venomoth
Bruno(43): EQ OHKOes Hitmontop (through Dig) and Hitmonlee (which goes for Foresight) and 2HKOes Hitmonchan. Seems to OHKO Onix on rolls as well, though Blizzard will get the kill for sure
Karen(43): beats Murkrow, Vileplume, and Gengar. Houndoom is faster and OHKOes with Flamethrower
Lance(43): can beat two Dragonites if lucky
Silver(33): NMI Blizzard OHKOes Golbat and Haunter and 2HKOes Meganium, which will generally 1v1 you. Sneasel is 2HKOed by Return
Clair(38): NMI Blizzard OHKOes Dragonair. You can barely live at red by the time you KOed all of those, assuming you never miss Blizzard
Silver(40): EQ and NMI Blizzard OHKO everything
Will(42): NMI Blizzard OHKOes Xatu and Exeggutor, while EQ OHKOes Jynx. You are fairly slow here, so expect hax
Koga(42): NMI Blizzard OHKOes Crobat on rolls. EQ OHKOes Muk, 3HKOes Forry, and 2HKOes Ariados/Venomoth
Bruno(43): EQ OHKOes Hitmontop (through Dig) and Hitmonlee (which goes for Foresight) and 2HKOes Hitmonchan. Seems to OHKO Onix on rolls as well, though Blizzard will get the kill for sure
Karen(43): beats Murkrow, Vileplume, and Gengar. Houndoom is faster and OHKOes with Flamethrower
Lance(43): can beat two Dragonites if lucky
I decided to apply my typical therapy™ for Pokemon lacking any real good moves and caught it in a Friend Ball, giving it Return and Blizzard immediately. Swinub is... terrible until evolution. It has a hard time killing most things and, when it does, it has to be healed after fights. Furthermore, Slow growth rate was just bleh when you want to evolve it ASAP; I had to use tons of skipped trainers + out of the way trainers (like the Union Cave ones) just to get it to Piloswine before the tunnel rival fight. It is okay with EQ, but it also relies heavily on Blizzard hitting to kill certain things
E-tier seems the best tier for Swinub, given the enormous investment and the unreliability it comes with.
===
I will probably do another run before I stop, since I think I've run with virtually everything (other than stuff like Smeargle and Ditto which are unusable)