Which move is better?

[Mitch's Bashamo]

I want to know which move to breed onto my Blissey, Aromatheraphy or Heal Bell.

[Xenesis]

It only matters if you have a pokemon with soundproof on your team. (Exploud and Electrode are the only ones that I can think of)

Heal Bell doesn't affect Soundproofed pokemon, while Aromatherapy does.

Aromatherapy is probably easier to breed on, anyhow.

[Silent Dragonfly]

Mr.Mime is also Soundproof

[andyizcool]

Any of the moves are good moves because only Soundproof Pokemon stop Heal Bell. Everyone should know those Soundproof Pokemon are rarely used because they're all UU Pokemon anyway.

[Puaru]

Better name: Heal Bell.
Better move: I myself like Aromatheraphy.

[Sir Chris]

I like aromatherapy. Sure, soundproof may be uu, but why limit your options?

[Ultimate Pikachu]

Aromatherapy is easier to breed on and effects Soundproof Pokémon.

[phaedrus]

Aromatherapy.