Wailmer
EDIT: I think Wailmer can only learn dive.
Dive is not an HM/TM anymore so it can't learn dive, but you can get it from a different region so if you trade a Pokemon holding that move then take it off them it can learn dive.
The HM dive cannot be acquired in Pokemon diamond.
No. Dive is an HM in kanto, so you can't use it out of battle. Some Pokemon can learn dive with no Tms or HMs, but you can't use it as a field move.
You can't because you can't dive in Pokemon diamond or pearl.
There is no HM called dive in Pokemon Diamond you fat oaf.
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.
You have to get them to learn the move dive.
In Platinum, Diamond, and Pearl they removed Dive.
Dive is not an HM move in Pokemon Platinum. There are, however, Pokemon that can learn it by level up.
the vast majority of water type pokemon, excluding magikarp and i think feebas. If you have something that knows surf, odds are it can learn dive
most water Pokemon
Dive is an HM, but in Diamond,Pearl, and Platnum, it is a TM