This is a Viability Ranking for the Classic Duel mode in Monster Legends. The monsters here are ranked based on popular opinion through the comments and polls, which is based on how well they perform in Classic Duels. The Grand Duels Viability Ranking can be found here.

OP Rank

These monsters are the best ones to choose in Classic Duels, and should almost always be chosen if you get them.

Op-rank.png
Fampirastral.png
Fampirastral
Fract-Bot.png
Fract-Bot
L1ght.png
L1ght
Lindworm.png
Lindworm
Lord Platypus.png
Lord Platypus
Luponudo.png
Luponudo
Ophiuchus the Zodiac.png
Ophiuchus the Zodiac
Roboelf.png
Roboelf 
Roost Waine.png
Roost Waine

SS Rank

These monsters are very good picks in Classic Duels, and only fall short of OP due to minor issues with stats, moves, or traits.

Ss-rank.png
Chuckle Muckel.png
Chuckle Muckel
Master Masher.png
Master Masher

S Rank

These monsters perform well in the Classic Duels metagame. Not the absolute best choices, but will still work fine if you don't get better options.

S-rank.png
Arobat.png
Arobat
Blackfeather.png
Blackfeather
Nahane.png
Nahane
Noahgnarok.png
Noahgnarok
Rody.png
Rody
Rotten.png
Rotten
Slugazoid.png
Slugazoid
Solarflare.png
Solarflare 
The Dreamer.png
The Dreamer
Witchkat.png
Witchkat

A Rank

These monsters are okay picks for Classic Duels. Definitely not ideal picks, but they'll work if you don't get better options.

A-rank.png
Axolmech.png
Axolmech
Henritch.png
Henritch
Ignis.png
Ignis
Kodama.png
Kodama
Letalis.png
Letalis
Moon Ming.png
Moon Ming
Rhinata.png
Rhinata
Tabora.png
Tabora 
The Dooo.png
The Dooo
Varupapu.png
Varupapu

B Rank

These monsters are below average in the Classic Duels metagame, but can still perform alright in the right situations.

B-rank.png
Atrox.png
Atrox
Calamedic.png
Calamedic
Captain Alvid.png
Captain Alvid
Chimaney.png
Chimaney
Cryocrawler.png
Cryocrawler
Diegael.png
Diegael
Ferrus.png
Ferrus
Hardy.png
Hardy 
Krampus the Killjoy.png
Krampus the Killjoy
Mani Pulate.png
Mani Pulate
Steamwrath.png
Steamwrath

C Rank

These monsters are not great choices in the Classic Duels meta. Avoid choosing these monsters if you can, only pick them if there are no better options.

C-rank.png
Anton Acosmic.png
Anton Acosmic
Bingxen.png
Bingxen
Bombeta.png
Bombeta
Dratis.png
Dratis
Execumancer.png
Execumancer
Lightmare.png
Lightmare
Ourosmic.png
Ourosmic
Pulsus.png
Pulsus 
Rusalka.png
Rusalka
Shelly.png
Shelly
Spitfire.png
Spitfire
Vanoss2099.png
Vanoss2099
Vishamah.png
Vishamah
Zuperfox.png
Zuperfox

D Rank

These monsters perform poorly in the Classic Duels metagame. Try to avoid choosing these monsters as much as you can, there are very few situations where these monsters will perform well.

D-rank.png
Firustar.png
Firustar
Heiss.png
Heiss
Iguanazaur.png
Iguanazaur
Kaguya.png
Kaguya
Kaih the Sunmelter.png
Kaih the Sunmelter
Katsuko.png
Katsuko
Kraster.png
Kraster
Necrolicht.png
Necrolicht 
Spawny.png
Spawny
The Hacksmith.png
The Hacksmith
Ullrica.png
Ullrica
Undead Mr. Beast.png
Undead Mr. Beast

F Rank

These monsters are the worst of the worst in Classic Duels, and should never be picked. They will help your team very little, if at all, compared to other monsters.

F-rank.png
Seaquake.png
Seaquake
Targon.png
Targon
TeddieVR.png
TeddieVR
Tesakuiper.png
Tesakuiper
Thunderkong.png
Thunderkong
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