This is a redo of a previous question because even though I got some helpful pointers, they gave me ideas for items or pokemon switches, but I they didn't tell which item the pokemon should have and they didn't tell me which pokemon I should replace.
Hard DK (Darmanitan-Galar) @ Choice Scarf
Ability: Gorilla Tactics
Shiny: Yes
EVs: 4 HP / 252 Atk / 252 Spe
Jolly Nature
- Earthquake
- Flare Blitz
- Icicle Crash
- U-turn
Santa (Ho-Oh) @ Heavy-Duty Boots
Ability: Regenerator
Shiny: Yes
EVs: 252 HP / 4 Atk / 252 Def
Impish Nature
- Roost
- Thunder Wave
- Sacred Fire
- Defog
Whale hello there (Kyogre) @ Choice Scarf
Ability: Drizzle
Shiny: Yes
EVs: 4 Def / 252 SpA / 252 Spe
Timid Nature
IVs: 0 Atk
- Water Spout
- Origin Pulse
- Thunder
- Ice Beam
Planetshadow (Marshadow) @ Focus Sash
Ability: Technician
EVs: 252 Atk / 4 Def / 252 Spe
Jolly Nature
- Close Combat
- Spectral Thief
- Shadow Sneak
- Rock Tomb
Bacon Birb (Yveltal) @ Life Orb
Ability: Dark Aura
EVs: 4 Atk / 252 SpA / 252 Spe
Naive Nature
- Sucker Punch
- Heat Wave
- Dark Pulse
- Oblivion Wing
Generator 5 (Zekrom) @ Leftovers
Ability: Teravolt
Shiny: Yes
EVs: 252 Atk / 4 SpD / 252 Spe
Jolly Nature
- Substitute
- Dragon Claw
- Bolt Strike
- Dragon Dance
Please give suggestion for pokemon and items with a complete description of the changes I should make.