Meltan doesn't have an evolution listed in the moveset list, so it may be a special event/form change that makes Melmetal.
No (Toxic) Spikes, Dragon Dance, Sleep Talk Snorlax, Curse, Rapid Spin(!) and more if the leak is correct
They already said Meltan can only be evolved in GO, which is stupid as it means the only reason you'd transfer over a Meltan is just for Dex completion (is Meltan & Melmetal even in the dex?).
And those are odd exclusions, especially Rapid Spin because not there's nothing to stop Stealth Rocks. Makes me wonder if the inclusion of Stealth Rocks was a mistake, entry hazards didn't exist in Gen I. *shrugs*
Also, the few things that get Helping Hand here are not technically new, but were previously only obtainable as XD moves so I thought it was relevant to point them out.
Maybe they should consider doing that more with past Pokemon who has special moves. Obviously I'm not talking about letting Rayquaza having V-Create or Lugia having Psycho Boost, but there were other moves certain Pokemon learned via the Colosseum games and plenty of miscellaneous event giveaways. Add those special moves to the Pokemon's movepool (be it level-up or Egg move) next gen so you don't got to worry about whether it's legal or not. As for notable new moves that catch my eye:
Beedrill - Outrage (Mega Beedrill dragon killer?)
Golbat - Crunch (IT DIDN'T ALREADY LEARN THIS? IT'S A VAMPIRE BAT!)
Parasect - Sleep Powder (it has Spore... )
Arcanine - Play Rough (let it be known Arcanine got the strong physical Fairy-type move before Xerneas, Tapu Koko, and Tapu Bulu)
Poliwrath - Superpower (wait, this is a Tutor move, how did Poliwrath not already get this?)
Farfetch'd - Razor Leaf (for some reason this just makes me laugh, lol)
Electrode - Thunder Shock (WOW, I didn't realize Voltorb family's didn't get an Electric-type move in their level-up movepool until Gen III...)
Exeggutor (both) - Power Whip (GF, if you want Exeggutor to be a Physical attacker then swap its Attack and Special Attack already (and also give it Zen Headbutt so it has a Physical Psychic-type move))
Lickitung - Acid (Eww... actually, giving it Gastro Acid would probably be more useful to it)
Pinsir - Helping Hand & Outrage (YOU DIDN'T GIVE PINSIR ANY FLYING-TYPE MOVES! At least give it Aerial Ace!)
Eevee - Pay Day (wait, what? Why?)
List of moves that aren't in the Level-Up/TMs:
https://pastebin.com/v9cuj21J
Struggle (So what happens when a Pokemon runs out of PP?)
Conversion 2 (F.U. Porgyon)
Mach Punch (F.U. Hitmonchan)
Spikes/Toxic Spikes/Sticky Web (you got rid of all entry hazards except the worst one, WTF GF?)
Bone Rush (F.U. Cubone family)
Giga Drain (aww, I was hoping they'd increased it to 100 Power)
Attract/Captivate (so this means there's no Infatuation status ailment in the game)
Return (because we wouldn't want the Starter Pikachu and Eevee not feel special, Arceus forbid)
Heal Bell/Aromatherapy/Refresh (and outside of items there's no status ailment healing)
Baton Pass (good thing Teleport was changed)
Extreme Speed (wha? But this is like Arcanine's spiritual Signature move!)
Ancient Power (F.U. Omanyte family)
Endeavor (RIP F.E.A.R. Rattata)
Frenzy Plant/Blast Burn/Hydro Cannon (I'm sorry Venusaur, Charizard, and Blastoise, but are your names Pikachu and Eevee? No, then no special moves for you!)
Poison Fang (F.U. Zubat family and Ekans family... not that Poison Fang was strong to begin with but it was at least a Physical Poison-type move)
Icicle Spear (F.U. Cloyster and Alolan Sandslash)
Twister/Dragon Rush/Dragon Claw/Dragon Breath/Dragon Pulse/Draco Meteor/Dragon Dance (so the Dragon-type moves the Dratini family has is Dragon Tail and Outrage?)
Volt Tackle (F.U. Pikachu... wait, what?)
Energy Ball/Leaf Storm (Why?)
Elemental Fangs (sorry quadruped Pokemon, but if you can't punch your don't deserve to have coverage moves)
Iron Head/Metal Claw/Gyro Ball (WTF does Alolan Sandshrew have then?!)
So, let me get this straight GF, it looks like you looked through and messed with every Pokemon's movepool, trying to remove as many non-Gen I moves you could without crippling the Pokemon even though you not only did for a few of them but also didn't help give some Pokemon alternatives they could use.
What the F@#$ is wrong with you, GF?