I've been researching movepool oddities for the relaunch of LogicMons (you can join the Discord if you DM me), and I have used a lot of stuff from this thread but also found a few more:
Pincurchin joins Stunfisk as the only other Electric-type that can't learn Volt Switch.
"Aggron has a horn sharp enough to perforate thick iron sheets. It brings down its opponents by ramming into them horn first."
Doesn't learn Megahorn, the move where "Using its tough and impressive horn, the user rams into the target with no letup."
It's clear the logic with the distribution of Coaching was "if you're a Fighting-type (or you were supposed to be one in the case of Cinderace and Zeraora) you get this". Therefore why doesn't Incineroar get it? It's clearly a would-be Fighting-type, and it does a sport it could coach people in.
"If this Pokémon's body is damaged in battle, it is said to seek out suitable rocks on its own to repair itself."
"If any part chips off in battle, it attaches rocks to repair itself."
Yet it doesn't get Recover or any sort of recovery outside Rest.
Why don't they get Tri Attack? Other Pokemon with a theme of three do so (like Hydreigon, Dodrio and Dugtrio's three heads, and Magneton and Probopass's three magnets).
"Torkoal digs through mountains in search of coal."
"They dig tirelessly in search of coal."
Doesn't learn Dig.