the hm move strength is found in the cave Rusturf tunnel
Pokemon cannot forget HM's unless they're in Pokemon Mystery Dungeon. But, if its from Emerald, add another Pokemon to your party that knows surf and ask the move deleter.
H.M
There is a move deleter who can make pokemon forget HM moves.
Since dive is not a HM in firered you will have to trade a Pokemon to a friend that has ruby, sapphire or emerald then using that game use the HM Dive to teach the move Dive to that Pokemon trade it back so firered can have that Pokemon again it will still have Dive however you cannot use it to dive underwater.
You can just reteach it since HM are reusable.
A HM is a move is a move that can be tought to as many Pokemon as you like but the Pokemon has to be able.
The Pokemon that can learn any move from TM's and HM's is Mew.
Hidden Move 8.
yes
move deleter in lilycve (end of game)
youdon't defog is a hm move that is in Pokemon diamond, pearl, and platinum
Go to Lillycove City and in that town there is a move deleter who will delete any move (Including HM's) for free.
You have to teach one of your Pokemon the HM 'Strength' and use it.
HM 05 is flash
defeat the mossdeep city gym leaders and you will receive it after their defeat.
The Move Deleter's house is located in Lilycove City.
Dive is not an HM available in Leafgreen. If you want to teach a pokemon Dive trade it to any of the Hoenn Region pokemon games (Ruby, Sapphire, Emerald) and use the HM Dive to teach the move and then you can trade it back. NOTE you cannot use Dive outside of battle just like Ruby, Sapphire, Emerald since it's not an HM instead it's a regular move that can be removed either by the Move Deleter or by teaching a different move.