Walkthrough
Just north of the Meetup Spot is the Wild Area found in The Galar Region, which are many different fields that contain a variety of different Pokemon. The first section of the Wild Area includes Rolling Fields, Dappled Grove, West Lake Awewell, Watchtower Ruins, Axew's Eye, South Lake Miloch, Giant's Seat, North Lake Miloch, and East Lake Awewell. The Weather also rotates within each given section of the Wild Area, allowing different Pokemon to appear depending on the weather. Also found with the Wild Area are Pokemon Dens that could contain Max Raid Battles, as well as a number of Watt Traders that will sell you a variety of items in exchange for Watts.
The goal at this point in the game is to make it through the many sections Wild Area on your way to meeting Hop in Motostoke. However, take some time to participate in the lower-leveled Max Raid Battles while you do so you can help improve your Pokemon Team. Just watch out for the Strong Pokemon that walk the Wild Area, as they will be far to strong to battle/capture. (Do note that all Wild Pokemon will be at Level 60 after the completion of the Main Story.)
Berry Trees - All Weather
Skwovet (50%): Levels 14-16
Cherubi (50%): Levels 14-16
Fishing - All Weather
Magikarp (58%): Levels 14-16
Barboach (40%): Levels 14-16
Basculin (2%): Levels 14-16
Stunky (50%): Levels 26-28
Bunnelby (30%): Levels 26-28
Gloom (20%): Levels 26-28
Stunky (40%): Levels 14-16
Stufful (30%): Levels 14-16
Pidove (20%): Levels 14-16
Diggersby (10%): Levels 14-16
Special Overworld - Normal Weather
Corviknight: Level 50
Lucario: Level 36
Xatu: Level 26
Liepard: Level 28
Boltund: Level 65
Waters - Normal Weather
Frillish (60%): Levels 42-45
Wingull (25%): Levels 42-45
Drifloon (10%): Levels 42-45
Barboach (5%): Levels 42-45
Special Waters - Normal Weather
Lapras: Level 56
Whiscash: Level 46
Jellicent: Level 46
Overworld - Overcast
Stunky (55%): Levels 26-28
Purrloin (35%): Levels 26-28
Gloom (10%): Levels 26-28
Grasses - Overcast
Stunky (40%): Levels 14-16
Machop (30%): Levels 14-16
Stufful (20%): Levels 14-16
Gastly (10%): Levels 14-16
Special Overworld - Overcast
Corviknight: Level 50
Seismitoad: Level 36
Xatu: Level 26
Liepard: Level 28
Boltund: Level 65
Waters - Overcast
Wingull (60%): Levels 42-45
Frillish (25%): Levels 42-45
Barboach (10%): Levels 42-45
Drifloon (5%): Levels 42-45
Special Waters - Overcast
Gyarados: Level 56
Whiscash: Level 46
Jellicent: Level 46
Overworld - Raining
Palpitoad (50%): Levels 26-28
Purrloin (30%): Levels 26-28
Gloom (20%): Levels 26-28
Grasses - Raining
Tympole (40%): Levels 14-16
Grubbin (30%): Levels 14-16
Stunky (20%): Levels 14-16
Stufful (10%): Levels 14-16
Special Overworld - Raining
Corviknight: Level 50
Skuntank: Level 36
Pelipper: Level 26
Liepard: Level 28
Boltund: Level 65
Waters - Raining
Barboach (60%): Levels 42-45
Goldeen (28%): Levels 42-45
Wingull (10%): Levels 42-45
Frillish (2%): Levels 42-45
Special Waters - Raining
Lapras: Level 56
Seaking: Level 46
Jellicent: Level 46
Pelipper: Level 36
Overworld - Thunderstorm
Palpitoad (60%): Levels 26-28
Gloom (30%): Levels 26-28
Purrloin (10%): Levels 26-28
Grasses - Thunderstorm
Grubbin (40%): Levels 14-16
Joltik (30%): Levels 14-16
Stunky (20%): Levels 14-16
Stufful (10%): Levels 14-16
Special Overworld - Thunderstorm
Corviknight: Level 50
Seismitoad: Level 36
Pelipper: Level 26
Liepard: Level 28
Boltund: Level 65
Waters - Thunderstorm
Goldeen (60%): Levels 42-45
Drifloon (25%): Levels 42-45
Frillish (10%): Levels 42-45
Barboach (5%): Levels 42-45
Special Waters - Thunderstorm
Lapras: Level 56
Whiscash: Level 46
Seaking: Level 46
Jellicent: Level 46
Overworld - Snowing
Vanillite (60%): Levels 26-28
Purrlion (25%): Levels 26-28
Snorunt (10%): Levels 26-28
Delibird (5%): Levels 26-28
Grasses - Snowing
Snorunt (40%): Levels 14-16
Snover (30%): Levels 14-16
Stunky (20%): Levels 14-16
Stufful (10%): Levels 14-16
Special Overworld - Snowing
Corviknight: Level 50
Vanillish: Level 36
Xatu: Level 26
Liepard: Level 28
Boltund: Level 65
Waters - Snowing
Vanillite (60%): Levels 42-45
Frillish (25%): Levels 42-45
Wingull (10%): Levels 42-45
Drifloon (5%): Levels 42-45
Special Waters - Snowing
Lapras: Level 56
Vanillish: Level 36
Overworld - Snowstorm
Vanillite (60%): Levels 26-28
Klink (25%): Levels 26-28
Snorunt (10%): Levels 26-28
Purrloin (5%): Levels 26-28
Grasses - Snowstorm
Delibird (40%): Levels 14-16
Snover (30%): Levels 14-16
Stunky (20%): Levels 14-16
Snorunt (10%): Levels 14-16
Special Overworld - Snowstorm
Corviknight: Level 50
Vanillish: Level 36
Xatu: Level 26
Liepard: Level 28
Boltund: Level 65
Waters - Snowstorm
Vanillite (60%): Levels 42-45
Driloon (25%): Levels 42-45
Frillish (10%): Levels 42-45
Barboach (5%): Levels 42-45
Special Waters - Snowstorm
Lapras: Level 56
Vanillish: Level 36
Overworld - Intense Sun
Stunky (60%): Levels 26-28
Bunnelby (25%): Levels 26-28
Dwebble (10%): Levels 26-28
Vulpix(Sword)/Growlithe(Shield) (5%): Levels 26-28
Grasses - Intense Sun
Mudbray (40%): Levels 14-16
Stunky (30%): Levels 14-16
Boltoy (20%): Levels 14-16
Stufful (10%): Levels 14-16
Special Overworld - Intense Sun
Corviknight: Level 50
Skuntank: Level 36
Xatu: Level 26
Liepard: Level 28
Boltund: Level 65
Waters - Intense Sun
Barboach (60%): Levels 42-45
Drifloon (25%): Levels 42-45
Frillish (10%): Levels 42-45
Wingull (5%): Levels 42-45
Special Waters - Intense Sun
Pelipper: Level 36, Level 56
Whiscash: Level 34
Overworld - Sandstorm
Golett (60%): Levels 26-28
Stunky (25%): Levels 26-28
Bunnelby (10%): Levels 26-28
Dwebble (5%): Levels 26-28
Grasses - Sandstorm
Dwebbly (40%): Levels 14-16
Boltoy (30%): Levels 14-16
Stunky (20%): Levels 14-16
Mudbray (10%): Levels 14-16
Special Overworld - Sandstorm
Corviknight: Level 50
Skuntank: Level 36
Xatu: Level 26
Liepard: Level 28
Boltund: Level 65
Waters - Sandstorm
Barboach (60%): Levels 42-45
Goldeen (25%): Levels 42-45
Frillish (10%): Levels 42-45
Drifloon (5%): Levels 42-45
Special Waters - Sandstorm
Gyarados: Level 56
Seaking: Level 46
Whiscash: Level 46
Overworld - Fog
Drifloon (60%): Levels 26-28
Stunky (28%): Levels 26-28
Purrloin (10%): Levels 26-28
Ralts (2%): Levels 26-28
Grasses - Fog
Natu (45%): Levels 14-16
Stufful (30%): Levels 14-16
Stunky (20%): Levels 14-16
Ralts (5%): Levels 14-16
Special Overworld - Fog
Corviknight: Level 50
Drifblim: Level 36
Xatu: Level 26
Liepard: Level 28
Boltund: Level 65
Waters - Fog
Frillish (60%): Levels 42-45
Barboach (25%): Levels 42-45
Drifloon (10%): Levels 42-45
Wingull (5%): Levels 42-45
Special Waters - Fog
Lapras: Level 56
Jellicent: Level 36
Items
Thunder Stone: On Cliffside Overlooking Giant's Seat
Big Mushroom (Respawns): Hidden Near Northern Tree
Big Mushroom (Respawns): Hidden Near Northeastern Tree
Great Ball (Respawns): Hidden Near Bush Alongside Northeastern Wall
Big Mushroom (Respawns): Hidden Near Northern Tree
Revive (Respawns): Hidden Between Two Southern Trees
Pearl (Respawns): Hidden In Water
Pearl (Respawns): Hidden In Water
Rawst Berries: Berry Tree
Persim Berries: Berry Tree
Hondew Berries: Berry Tree
Aspear Berries: Berry Tree
Petaya Berries: Berry Tree