Walkthrough
After completing all of Mustard's Trials and receiving Kubfu, you will be tasked with exploring the Isle of Armor with Kubfu. Mustard will mark four specific locations to visit with Kubfu on your Town Map, which you must visit in order to take on the Tower of Two Fists. You should expect to visit or travel through the following areas of the Isle of Armor: Stepping Stone Sea, Loop Lagoon, Courageous Cavern, Brawler's Cave, Challenge Road, and Potbottom Desert.
Waters - All Weather
Poliwag (50%): Levels 40-45
Barboach (50%): Levels 40-45
Special Overworld - All Weather
Poliwrath: Level 36
Druddigon: Level 42
Loudred: Level 26
Swoobat: Level 28
Golduck: Level 26
Gigalith: Level 42
Special Water Encounters - All Weather
Whiscash: Level 42
Overworld - All Weather Outside Of Fog
Whismur (56%): Levels 13-18
Woobat (16%): Levels 13-18
Poliwag (16%): Levels 13-18
Azurill (5%): Levels 13-18
Lickitung (5%): Levels 13-18
Chansey (2%): Levels 13-18
Overworld - Fog
Whismur (56%): Levels 13-18
Woobat (16%): Levels 13-18
Poliwag (16%): Levels 13-18
Azurill (5%): Levels 13-18
Lickitung (5%): Levels 13-18
Blissey (2%): Levels 13-18
Items
Rare Bone: Near Giant Pillar
TR31: Near Middle Pokemon Den
Iron: Near Top Exit
Normal Gem: Hidden By Top Exit
Max Mushrooms: Respawn Daily & After Max Raid Battles