Grassy Surge creates a low-lying grassy field, like the move Grassy Terrain, when the Pokémon enters battle. It restores the HP of grounded Pokémon each turn and increases the power of Grass type attacks. Psychic Surge creates a low-lying psychic field, It prevents high-priority moves being used and increases the power of Psychic type attacks. Electric Surge creates a low-lying electric field, like the move Electric Terrain, when the Pokémon enters battle. It prevents grounded Pokémon from falling asleep.
Electric Surge. Electric Surge can be good to stop Spore, Sleep Powder, etc., but if the opponent has an Electric type move powered up by Electric Surge, it just might be enough to OHKO Hawlucha.
Psychic Surge. Psychic Surge is good to stop F.E.A.R. Pokemon, and if your Hawlucha has a setup like, if it has the Focus Sash and uses Swords Dance Psychic Surge can also stop the opponent from stoping you with Quick Attack, but Psychic Surge also powers up Psychic type moves, which agian, Hawlucha is weak to.
Grassy Surge. Grassy Surge isn't good for anything (lol).
I think Electric Surge would be the best for Hawlucha.
Hope I helped.