Favorite TM/HM of any Generation

[ianarceus]

What is your favorite TM/HM of any generation? I say mine is Dive because it let you access the abyssal ruins which are awesome.

Here is a link to all the TM's in each Generation.
http://bulbapedia.bulbagarden.net/wiki/TM
Here is a link to all the HM's in each Generation.
http://bulbapedia.bulbagarden.net/wiki/HM

 

[Artisan]

Roost because of its usefulness and you can never have too many hit points. Skarmory and Mandibuzz also use it well. For other generations I'd say Protect because you can base your next move on what the opponent used to attack you allowing you to get a good switch in/counter tactic.

 

[sodajet]

My favorites would have to be Earthquake and Dragon Pulse for being 2 excellent offensive moves. Earthquake is one of the best moves in the game with 100 damage and 100 accuracy. It only downside is the fact that flying Pokes can avoid it, but that really doesn't reduce its effectiveness at all. Dragon Pulse was one of my favorite TMs pre-nerf. It had a consistent 90 damage and never missed so it was really good with some of the special- attack oriented Dragon Pokemon (Salamence, Palkia). There are plenty of others but thee 2 really stand out to me.