These short enough?
Hoppip for
Bottom.
Hoppip
Availability: Routes 32 and 33, right after Violet City.
Stats: Bad. All he has is good speed.
Movepool: Horrible. He has almost no attacking options and has to rely on Synthesis with Status support.
Gyms that it fares well against:
Hoppip is only really capable of taking down Brock. Everyone else has at least one party member he cannot harm in any meaningful way, and often multiple ones.
Other info: Hoppip is really weak and almost completely useless. It can only attempt to use status to defeat most opponents, bar the occasional 4x grass weak. As such, I say it deserves a solid place in the
Bottom tier.
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Remoraid for
Bottom.
Remoraid
Availability: Remoraid is very late by Johto standards, swarming at an underleveled 20 or after reaching Kanto when you get the Super Rod at level 40. It's not available in Crystal..
Stats: Remoraid has pathetic defenses and only decent offenses, and its evolution has only average defense but rather good mixed offenses.
Movepool: Below average. Remoraid basically depends on Aurora/Ice Beam, Bubblebeam/Surf, Psybeam, and perhaps Thief. Nothing else works for it.
Gyms that it fares well against:
Remoraid comes late and really doesn't do so well, especially since it's underleveled. It can possibly take out Karen(bar Vileplume) and Blaine, but everyone else either resists or easily KOs Octillery.
Other info: Octillery is probably one of the worst fully evolved water types in the game. It comes late, is easy to miss, doesn't even have any good moves for the time it does show up and is dangerously easy to KO considering its lame speed. It does get acceptable coverage for some of the smaller fights, but realistically you'd be better off with any other Water. Not to mention Surfing is mandatory by the time you actually have access to it, so you probably already have a good Water..
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Oddish for
Low.
Oddish
Availability: Oddish is first found when you reach Ilex Forest, and is fairly common at night.
Stats: Good early on, but having a stone evo really gives him problems.
Movepool: Pretty bad. Oddish suffers from having only Absorb, Acid, and Cut for a long, long, time, and Sludge Bomb isn't much help. It takes until the E4 to get a useful attack move.
Gyms that it fares well against:
Oddish can help with Chuck, Bruno, Lt. Surge, Erika, and Brock, as well as cleaning up certain pokemon on other teams. It also isn't completely destroyed by Team Rocket, compared to other Grass types.
Other info: Vileplume's biggest two problems are severely bad damage early on and a difficult evolution. Both of these cannot be rectified until the E4, so using it's honestly an uphill battle. Cut being your best move against most things is very unpleasant, and being walled is never fun. In the end it's not so bad that it can't be used, it's just terrible enough that almost any other Grass type that isn't useless(examples of useless include Hoppip and Paras) probably does its job better. The poison neutrality is pretty good, though, and it's fairly usable in Kanto.