Here’s a list we put together for the various Techincal Machines you can buy in the Pokemon Sapphire/Ruby/Emerald games.
Very handy if your pokemon can’t learn by evolution or by level up. Mind you it can only learn it if compatible with their type.
Sapphire/Ruby/Emerald
Lilycove Dept. Store
TM14 Blizzard
TM15 Hyper Beam
TM16 Light Screen
TM17 Protect
TM20 Safeguard
TM25 Thunder
TM33 Reflect
TM38 Fire Blast
Mauville Game Corner
TM13 Ice Beam
TM24 Thunderbolt
TM29 Physic
TM32 Double Team
TM35 Flamethrower