In some cases I'll put more than one move, so assume the respective pokémon only gets one of either and not all of them
Mega Medicham: Knock Off
Mega Pidgeot: Focus Blast / Inferno / Sing / Zap Cannon
Kartana: Sunsteel Strike / Power Whip
Jirachi: Sacred Fire
Gengar: Moongeist Beam
Mimikyu: Spectral Thief
Greninja/Starmie/any offensive mon that likes using special water moves: Steam Eruption
Mega Blastoise: Origin Pulse
Mega Gardevoir/Mega Altaria/Sylveon/Mega Glalie/Aurorus/Mega Salamence/Porygon Z - Boomburst
Staraptor: High Jump Kick
Aerodactyl: Head Smash
Mega Aerodactyl: Brave Bird/Flare Blitz/Dragon Ascent
Suicune/Landorus-Therian/pretty much any defensive mon without recovery moves - Recover or any of its variations
Celesteela: Oblivion Wing
literally any reasonably fast special attacker: Geomancy/Quiver Dance
Mega Mawile/Mega Pinsir/Alolan Golem/Ursaring, a fuckton of other things: Extreme Speed
Tangrowth, Amoonguss, Toxapex, other slow pivots: Rapid Spin
Tapu Koko: Bolt Strike/Volt Tackle/Play Rough
Alolan Marowak: V-Create
I could go on but I'm tired