Maybe you should see steven in mossdeep 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.
Dive is not an HM in firered if you want a Pokemon to learn dive trade it to ruby, sapphire or emerald then take it back after teaching it the move.
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.
the hm dive is not available in pearl.
it isn't in Pokemon platinum its in ruby and Sapphire
Hm 08=Dive. You can get it in Mosdeep City in Steven House.
The HM Dive is given by steven at his house in mossdeep city.
You cannot get HM Dive in Pokémon LeafGreen.Since Dive is not an HM in leafgreen the only way to get one of your Pokemon to learn Dive is to trade it to ruby, sapphire or emerald then teach it Dive using the HM then trade it back to leafgreen.
there's no hm dive in firered.so that means you can't find it.but you can find it in Pokemon ruby,sapphire,emerald and more.
Dive is not an HM in leafgreen however some Pokemon can learn it on there own, if you want to have a Pokemon with dive have the Pokemon that you want learn dive in ruby or sapphire or emerald then have them trade you it and now you can use dive but not outside of battle because its not an HM.
Steven gives it to you at his house in mossdeep city.
on Pokemon dimond there isn't a move caled dive. but there are a hm called surf and waterfall.you cant