Anorith - Arguably the best Rapid Spinner available, with 95/75 offenses, Eviolite, Stealth Rock, Swift Swim, and good offensive typing
Arbok - Coil, good abilities
Audino - Pink blob with Regenerator and good support movepool
Basculin - Adaptability Aqua Jet
Beartic - Powerful with good coverage and decent bulk
Beedrill - Toxic Spikes + U-turn? Bit iffy here
Beheeyem - Analytic + 125 Special Attack
Bibarel - Simple Curse with good STABs
Butterfree - Quiver Dance + Sleep Powder + Compoundeyes/Tinted Lens
Camerupt - Meh defenses, but its unique typing with Solid Rock may allow it to serve as a niche check to some mons like it did Magmortar
Charmeleon - Overlooked in NU due to Charizard's presence, this thing still has Solar Power, with 80/80 offenses, access to Eviolite, and a less pronounced Stealth Rock weakness
Chatot - Nasty Plot with 92/91 offenses
Combusken - Speed Boost
Croconaw - Another overlooked mid-starter, has access to Eviolite and Dragon Dance with good physical bulk; may need to wait for Sheer Force to be relevant
Dodrio - Vicious physical sweeper, finally in a tier in which it is not outclassed by another Normal/Flying-type
Dragonair - Bulky Eviolite Dragon Dancer with ShedRest
Duosion - Meh bulk even with Eviolite, but its Calm Mind and Trick Room sets are both deadly
Fearow - Dodrio's main competition, access to Drill Run makes up for lower stats
Flareon - Niche special wall
Fraxure - Dragon Dance, Eviolite, 117 Attack
Frillish - One of the few viable Ghost-types available; good special bulk with Eviolite
Gigalith - No longer has competition from Golem, incredibly tankish stats with Sturdy and Stealth Rock
Glaceon - Powerful Specs user, but low Speed and no Hail to abuse
Glalie - One of the few viable Spikers
Golbat - Fast wall with great defensive typing and movepool
Gothorita - Shadow Tag with Eviolite
Granbull - Unique support options in Intimidate, Thunder Wave, Heal Bell; stiff competition from Stoutland
Grumpig - Fast special wall with Thick Fat and good Special Attack with access to Calm Mind; stiff competition from Hypno
Huntail - Shell Smash! Like a physical/mixed Gorebyss
Hypno - Special wall with access to Wish, Nasty Plot, and Baton Pass; stiff competition from Grumpig
Jumpluff - Annoyer extraordinaire with high Speed and good offensive support options, not to mention a gimmicky Swords Dance set
Kingler - Powerful double Dancer
Klang - Shift Gear, Eviolite, one of the few viable Steel-types
Laion - Extremely physically bulky with Eviolite, recoil-less Head Smash, one of few Steel-types
Lampent - One of the few viable Ghost-types available; not terribly bulky, but good Special Attack, unique typing, and eventually Shadow Tag
Leafeon - Bulky Grass-type sweeper; Sawsbuck may be gone, but still faces competition from Leavanny
Leavanny - Grass-type sweeper; similar to Leafeon, but sacrifices bulk in favor of dual STAB
Lickitung - Bulky Normal-type with good support options
Linoone - Gluttony Belly Drum ExtremeSpeed!
Luxray - Alright bulk, good defensive typing, good abilities, 120 Attack
Machoke - Eviolite, 100 Attack, No Guard DynamicPunch; no longer faces competition from Gurdurr
Magmar - Good special bulk with Eviolite, 95/100/93 offenses
Mantine - Great special bulk, niche Rain sweeper
Maractus - One of the few viable Spikers
Masquerain - Butterfree's main competition, Quiver Dance + Baton Pass + unique coverage options + Intimidate
Mawile - One of the few viable Steel-types, versatile
Meganium - Bulky Grass-type; faces stiff competition from Vileplume
Mr. Mime - Versatile Baton Passer, 100/90 offenses
Muk - Great bulk with 105 Attack
Murkrow - Prankster with good movepool, including reliable recovery; surprising 85/85/91 offenses
Omanyte - Access to all entry hazards, great physical bulk with Eviolite, 90 Special Attack with good offensive typing
Pelipper - Good physical bulk, niche Rain sweeper
Persian - Good scouting movepool, surprising Nasty Plot sweeper
Pikachu - Light Ball, 90 Speed
Pupitar - Most overlooked mid-pseudo, very similar to Dragonair (ShedRest, similar bulk, 84 Attack); trades good defensive typing for great offensive typing
Raichu - No longer faces competition from Electabuzz, versatile Electric-type sweeper
Rampardos - 165 Attack, Mold Breaker, surprising Special capabilities with Sheer Force
Rapidash - Premier offensive Fire-type with 100/105 offenses
Raticate - 81/97 offenses with Guts and good movepool
Regigigas - Fantastic 110/110/110 defenses backed by the possibility of 160/100 offenses
Rotom-F - Great STAB coverage and support options
Scraggy - Good bulk with Eviolite, great offensive typing
Seadra - Great physical bulk with Eviolite, surprising 95/85 offenses
Servine - Irrevelevant for now, but once it gets Contrary...
Shelgon - Great physical bulk with Eviolite, Dragon Dance
Shiftry - Versatile sweeper
Shuckle - It's Shuckle!
Simipour - Nasty Plot monkey...
Simisage - Another Nasty Plot monkey...
Simisear - Still a Nasty Plot monkey
Slaking - Instagib button, but still lazy
Sneasel - Versatile, but fragile, physical threat
Solrock - Unique Rock-type, has Stealth Rock and better STABs over Lunatone
Staryu - One of the few viable Rapid Spinners, with bonus reliable recovery
Stoutland - Similar support options to Granbull, but with more bulk and Speed, lower Attack and no Heal Bell
Stunfisk - Good bulk, surprising Special Attack, unique typing
Swanna - Versatile Rain sweeper
Swoobat - Simple Calm Mind with 114 Speed
Tentacool - One of the few viable Rapid Spinners, with bonus Toxic Spikes and reliable recovery
Throh - Great bulk, good Attack, Bulk Up, Circle Throw
Togetic - Great bulk with Eviolite, good support movepool, Nasty Plot
Tropius - Harvest hax
Ursaring - 130 Attack status absorber with both Guts and Quick Feet
Victreebel - Best Sun sweeper available
Vigoroth - Versatile physical threat, bulky with Eviolite and reliable recovery
Vileplume - Bulky Grass-type with good Special Attack
Volbeat - Prankster Nasty Plot Baton Pass
Wailord - Water Spout and not much else
Walrein - I don't get it - sure, it can't Stallrein without Hail, but it's got 110/90/90 defenses, 95 Special Attack, good support options and Thick Fat; needs more love
Whirlipede - Great bulk with Eviolite, good defensive typing, access to both Spikes and Toxic Spikes
Whiscash - Dragon Dance, Hydration
Wormadam-S - Easily the best Wormadam forme, which isn't saying much, but it's got decent defenses, great defensive typing, and access to Stealth Rock unlike its cousins
Zweilous - Hustle Outrage!