Gallade the order of these moves confuses me.
If you can run behind Alakazam with extra speed to protect from the entirety of the surf, Use Shell Smash as soon as possible, then chain dazzling gleam to the first dazzling gleam.
If you cannot do it in that order then Dazzling gleam in response to the Dazzling gleam, then shell smash and run behind Alakazam for protection.
Either way, chain to the second dazzling gleam with another dazzling gleam. If you have enough money afterward buy a combo 4, mega sizing it if possible too. If this would not protect you fully from the Surf do not do these
If those would not protect you from the surf fully, chain to the first dazzling gleam with Dazzling gleam, then chain a Surf to the surf and a Dazzling gleam to the 2nd gleam chain. Then buy a combo 5 if possible, megaing it if even more possible.