I've decided to make a viability ranking (in my opinion, subject to change later) of all the top Pokèmon in Fortemons. Soo...
S Rank- Made for only Pokèmon who excel in the current meta. These mons are the hardest to KO, easiest to sweep with, and counter a lot of the standard Pokèmon running around.
A Rank- Made for Pokèmon who are great in the current meta, but can be stopped in their tracks by other Pokèmon or do their job just a little bit worse than the S ranks.
B Rank- Made for the Pokemon who do everything good, just slightly worse than those in the A or S ranks. These Pokemon are often still usable, but they might take a little more thought within team building
C Rank- Made for the Pokèmon who are mediocre in the current meta. They're either hard-countered by some Pokèmon, are outclassed by other mons, easy to predict, or just simply it's really hard to build a team around them.
S Rank
-Tapu Lele (Choice Scarf, Draining Kiss, Charge Beam)
-Tsareena (Feint, Giga Drain, U-Turn, Rapid Spin, Trop Kick)
A+ Rank
-Heatran (Magma Storm, Flame Charge, Leftovers)
-Celesteela (Absorb, Flame Charge, Leftovers)
-Blacephalon (Flame Charge)
-Muk- Alola (Payback, Return, Giga Drain)
-Ash Greninja (U-Turn)
A Rank
-Victini (U-Turn, Flame Charge, Quick Attack, Return)
-Greninja (Return, U-Turn)
- Zeraora (Volt Switch)
- Mew (Dragon Tail, Frost Breath, Flame Charge, Volt Switch)
-Tyranitar (Payback, Avalanche, Tyranitarite)
A- Rank
-Kartana (Return, Vacuum Wave, Choice Scarf)
- Bruxish (Aqua Jet, Frost Breath, Return, Choice Scarf)
-Zygarde (Extreme Speed, Choice Scarf, Thousand Arrows)
-Tapu Koko (Volt Switch, Quick Attack)
-Comfey (Return, U-Turn)
B+ Rank
-Lucario (Feint)
-Togekiss (Extreme Speed)
-Azumarill (Aqua Jet, U-Turn, Whirlpool)
-Conkeldurr (Mach Punch, Return)
B Rank
-Araquanid (Frost Breath, Leech Life)
-Pinsir (Feint)
-Heracross (Feint)
-Crawdaunt (Return, Aqua Jet, Fury Cutter)
B- Rank
-Toxapex (Infestation, Scald)
-Tapu Bulu (Giga Drain, Rock Tomb, Payback)
-Stakataka (Gyro Ball)
C+ Rank
-Infernape (Choice Scarf, U-Turn, Mach Punch)
-Mamoswine (Ice Shard, Freeze Dry, Icy Wind)
C Rank
-Medicham (Feint, Force Palm)
-Typhlosionu (Quick Attack, Flame Charge
C- Rank
-Electrivire (Feint, Discharge)
-Goodra (Feint, Dragon Tail)
-Bewear (Drain Punch, Return)
I'm adding more later.... if you have any suggestions, just post them below, and I'll take them into consideration. I've only got limited amounts of time atm, so adios