Or you could retain the overall synergy, speed, and get out multiple Kingdras.
You know the part of Dragon Pump where you can put twenty on a bench? That puts everything they throw at you in a standard Galactic deck within OHKO range (and Palkia/Dialga you don't have type advantage on). Albeit, you have to Toxicroak for Pluspowers. Another efficient way to do things is to actually use Alakazam's Power Cancel and get him set up fast.
Two Cancels, Two Dragon Pumps. Eight in discard. Retreat to your Kingdra, pull up another one, Aqua Stream. OHKO Toxicroak.
But as I've stated before, Spreading twenties with Dragon Pump makes it that much easier, when they have to blow a 'Turn to heal twenty to avoid getting OHKO'd.
Aqua Stream is your plan B.
However, if you're fanatically dead-set on teching against Galactic:
Uxie X helps you against Machamp and Toxicroak, OHKO'ing or nearly OHKO'ing both.
Mewtwo X (for the 120) and Azelf MT, Mesprit LA are also some techs, I frankly think that both of them ruin the consistency of the deck (one in requiring you to run Psychics which you can't use to Aqua Stream - your plan B, the other requiring you to eat up bench space, which begs for the Lost Cyclone in the Palkia Matchup, or Dark Palm wherever that's teched in).
As for Alakazam: Crobat, Turn, Crobat, Weavile G with six SPs in play and one Sp. Dark attached finished it off - more doable than you'd think.
Someone else referenced the ball engine. I'd wholeheartedly support it in the littler divisions, where Kingdra is played more for it's donk than it's late-game capabilities, but in older player's builds you'll want more "tricks" if you will to help shore up matchups.
So I have, in both posted, contributed to his request.
And as a final aside, if I'm ever in a situation where the ONLY option I have to pull up is an Alakazam or a Claydol to attack with, I've already lost that match.