Details: One of the fourteen Special Trainers you will encounter at The Battle Tree after completing certain winning streaks or as a partner in Multi Battle Mode is Anabel. Back in Pokemon Sun & Moon, Anabel assisted you during the Ultra Beast Storyline. Anabel has a mix of Pokemon, including the Legendary Beasts Trio.
Possible Pokemon:
Alakazam (Alakazite): Psychic, Focus Blast, Shadow Ball, Grass Knot
Alakazam (Choice Specs): Psychic, Focus Blast, Dazzling Gleam, Trick
Snorlax (Life Orb): Double Edge, Earthquake, Crunch, Protect
Snorlax (Assault Vest): Body Slam, Earthquake, Crunch, Fissure
Lucario (Lucarionite): Close Combat, Rock Slide, Blaze Kick, Bullet Punch
Lucario (Weakness Policy): Aura Sphere, Dragon Pulse, Stone Edge, Extreme Speed
Raikou (Shuca Berry): Thunderbolt, Volt Switch, Shadow Ball, Extrasensory
Raikou (Electrium Z): Charge Beam, Thunder Wave, Shadow Ball, Calm Mind
Raikou (Electrium Z): Thunderbolt, Volt Switch, Shadow Ball, Protect
Raikou (Air Ballon): Thunder, Discharge, Reflect, Extrasensory
Entei (Focus Sash): Overheat, Flame Charge, Fire Fang, Stone Edge
Entei (Chesto Berry): Calm Mind, Will-o-wisp, Flamethrower, Rest
Entei (Choice Scarf): Eruption, Fire Blast, Extrasensory, Solar Beam
Entei (Life Orb): Sacred Fire, Bulldoze, Stone Edge, Protect
Latios (Lax Incense): Calm Mind, Luster Purge, Dragon Pulse, Recover
Latios (White Herb): Draco Meteor, Thunderbolt, Psychic, Protect
Latios (Choice Specs): Draco Meteor, Thunder, Psychic, Energy Ball