Audino (F) @ Audinite
Ability: Healer
Level: 32
EVs: 252 HP / 4 Def / 252 SpA
Modest Nature
IVs: 0 Atk / 0 Spe
- Wish
- Calm Mind
- Dazzling Gleam
- Fire Blast
Checkpoint: Gym Leader Wattson
Format: Single Battle
Theme: Wild Battle
Estimated Difficulty: ★★★★★★★★★★ (10/10)
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Lopunny (F) @ Lopunnite
Ability: Limber
Level: 42
EVs: 252 Atk / 4 SpD / 252 Spe
Jolly Nature
- Fake Out
- Return
- High Jump Kick
- Fire Punch
Checkpoint: Gym Leader Flannery
Format: Single Battle
Theme: Wild Battle
Estimated Difficulty: ★★★★ (4/10)
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Pidgeot (M) @ Pidgeotite
Ability: Tangled Feet
Level: 45
EVs: 4 Def / 252 SpA / 252 Spe
Modest Nature
IVs: 0 Atk
- Hurricane
- Heat Wave
- Rest
- Sleep Talk
Checkpoint: Gym Leader Norman
Format: Single Battle
Theme: Gym Leader Battle
Estimated Difficulty: ★★★★★★★★★★ (10/10)
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Aerodactyl (M) @ Aerodactylite
Ability: Rock Head
Level: 53
EVs: 252 Atk / 4 Def / 252 Spe
Jolly Nature
- Wing Attack
- Earthquake
- Stone Edge
- Hone Claws
Checkpoint: Gym Leader Winona
Format: Single Battle
Theme: Gym Leader Battle
Estimated Difficulty: ★★★★★ (5/10)
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Latias (F) @ Latiasite
Ability: Levitate
Level: 63
EVs: 252 HP / 4 Def / 252 Spe
Bold Nature
IVs: 0 Atk
- Wish
- Psychic
- Heal Pulse
- Charm
Latios (M) @ Latiosite
Ability: Levitate
Level: 63
EVs: 252 Atk / 4 SpD / 252 Spe
Adamant Nature
- Dragon Dance
- Earthquake
- Dragon Claw
- Shadow Claw
Checkpoint: Gym Leaders Tate & Liza
Format: Double Battle
Theme: Rival Battle
Estimated Difficulty: ★★★★★★ (6/10)
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Hoopa-Unbound @ Tanga Berry
Ability: Magician
Level: 68
EVs: 252 Atk / 4 SpD / 252 Spe
Jolly Nature
- Hyperspace Fury
- Fire Punch
- Gunk Shot
- Drain Punch
Checkpoint: Primal Groudon/Primal Kyogre
Format: Single Battle
Theme: Archie/Maxie Battle
Estimated Difficulty: ★★★★★ (5/10)
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Volcanion @ Assault Vest
Ability: Water Absorb
Level: 70
EVs: 252 SpA / 4 SpD / 252 Spe
Timid Nature
IVs: 0 Atk
- Steam Eruption
- Flamethrower
- Earth Power
- Sludge Bomb
Checkpoint: Gym Leader Wallace
Format: Single Battle
Theme: Lugia Battle
Estimated Difficulty: ★★★★★ (5/10)
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Diancie @ Diancite
Ability: Clear Body
Level: 89
EVs: 252 SpA / 4 SpD / 252 Spe
Hasty Nature
- Diamond Storm
- Moonblast
- Earth Power
- Protect
Darkrai @ Dread Plate
Ability: Bad Dreams
Level: 89
EVs: 4 Def / 252 SpA / 252 Spe
Timid Nature
IVs: 0 Atk
- Dark Void
- Nasty Plot
- Dark Pulse
- Sludge Bomb
Checkpoint: Champion Steven
Format: Double Battle
Theme: Reshiram/Zekrom Battle
Estimated Difficulty: ★★★★★★★★★★★★ (12/10)
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Mew @ Light Clay
Ability: Synchronize
Level: 93
EVs: 252 HP / 4 Def / 252 Spe
Timid Nature
IVs: 0 Atk
- Light Screen
- Transform
- Metronome
- Reflect
Mewtwo-Mega-Y @ Expert Belt
Ability: Protean
Level: 93
EVs: 252 SpA / 4 SpD / 252 Spe
Modest Nature
IVs: 0 Atk
- Psystrike
- Thunderbolt
- Moonblast
- Secret Sword
Checkpoint: Rayquaza, Lorekeeper Zinnia, & Deoxys
Format: Double Battle
Theme: Rival Battle
Estimated Difficulty: ★★★★★ (5/10)
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Arceus @ Leftovers
Ability: Multitype
EVs: 4 HP / 252 Atk / 252 Spe
Jolly Nature
- Swords Dance
- Shadow Claw
- Earthquake
- Extreme Speed
Rayquaza @ Life Orb
Ability: Air Lock
Shiny: Yes
EVs: 252 Atk / 4 SpD / 252 Spe
Adamant Nature
- Dragon Dance
- Dragon Ascent
- Earthquake
- Extreme Speed
Checkpoint: Champion Steven (Post Delta Episode) - The "Final Boss"
Format: Double Battle
Theme: Zinnia Battle
Estimated Difficulty: ★★★★★★★★★★ (10/10)
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Groudon @ Red Orb
Ability: Drought
EVs: 252 Atk / 4 SpD / 252 Spe
Jolly Nature
- Swords Dance
- Precipice Blades
- Dragon Tail
- Rock Slide
Rayquaza @ Life Orb
Ability: Air Lock
EVs: 252 Atk / 4 SpD / 252 Spe
Adamant Nature
- Dragon Dance
- Dragon Ascent
- Earthquake
- Extreme Speed
Kyogre @ Blue Orb
Ability: Drizzle
EVs: 4 HP / 252 SpA / 252 Spe
Modest Nature
IVs: 0 Atk
- Water Spout
- Thunder
- Ice Beam
- Hydro Pump
Checkpoint: N/A (After defeating Post Delta Episode Champion Steven) - The "Bonus Boss"
Format: Triple Battle
Theme: Battle Chatelaine (ORAS)
Estimated Difficulty: ★★★★★★★★★ (10/10)
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Reward: Event Hoopa ported into game.
https://bulbapedia.bulbagarden.net/wiki/List_of_Japanese_region_serial_code_event_Pokémon_distributions_(Generation_VI)#Mighty_Hoopa