Sun and Moon move services and TM planning
Use reusable TMs, Mount Lanakila’s Move Reminder and the actual original-game tutor services.
Original Pokémon Sun and Pokémon Moon for Nintendo 3DS (2016). Sun and Moon differences are labelled. Ultra Sun and Ultra Moon have a different story, expanded Pokédex and altered trials.
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Reusable TMs and no field HMs
Sun/Moon have 100 reusable TMs. A pickup permanently gives access to the machine; teaching it does not consume it. Ride Pokémon handle field travel, so the party does not need HM moves to cross water, fly or push blocks. Surf and Fly still exist as battle moves and can be taught through their appropriate services. Use the TM location reference for exact original pickups.
The late Move Reminder
At Mount Lanakila’s Pokémon Center, exchange a Heart Scale with the Move Reminder. Sun/Moon can recover eligible current-species level-up moves even above the Pokémon’s present level, and can restore supported remembered Egg moves. This does not mean every forgotten tutor or TM move appears there. Review the offered list before accepting and keep a plan for a species whose pre-evolution has unique moves.
Other useful services
Hau’oli City’s Pokémon Center houses the Move Deleter. The Nursery has a Hidden Power type checker. Specialist tutors offer starter-combination moves, final starter elemental moves and qualifying signature moves at their locations. These services differ from Ultra Sun/Ultra Moon’s expanded BP tutor selection; original Sun/Moon do not have that later full move-tutor catalogue.
Match the move to the intended job
Inspect whether a move is physical, special or status, its accuracy and its useful effect. Same-type attack bonus helps, while coverage lets a partner contribute beyond one matchup. A Z-Crystal requires a compatible move as well as the held item. Save scarce Heart Scales for a specific improvement rather than replacing useful moves without checking the next trial or League team.
These guides cover original Pokémon Sun and Pokémon Moon (2016). Check the version and in-game time before planning an encounter.