I actually just caught my Sealeo, I was using Tentacool to surf around. But my current movesets are:
Sealeo: Surf, Rest, Snore, Dive
Dodrio: Fly, Pursuit, Pluck, Double Hit
Magneton: Spark, Tri Attack, Electro Ball, Flash Cannon
Claydol: Rock Tomb, Psybeam, Extrasensory, Hyper Beam
Blaziken: Flame Charge, Blaze Kick, Rock Smash, Double Kick
Shiftry: Leaf Blade, Feint Attack, Swagger, Hurricane
This team looks pretty good. some basic changes I might make are:
Swap Psybeam on Claydol for Earth Power since it's a strong STAB move and you have no ground type moves at all on your team, and it's a very good type offensively. Rock Tomb would be much better replaced by Ancient Power if you want to keep a rock type attack, or Shadow Ball to deal with ghosts that can threaten Claydol (I would replace Hyper Beam with Calm Mind as well but that's just my preference).
Swap Dive for Ice Beam on Sealeo. A very solid STAB move that hits a majority of fully evolved dragons for 4x damage (all the flying/dragon types and Garchomp and Flygon too)
Blaziken's move set isn't that great. Flare Blitz/High Jump Kick/Brave Bird would be great options, but if you don't like recoil/crash damage you should consider Blaze Kick, Sky Uppercut, Drain Punch or Power-Up Punch as well as other moves. If this is the HA Blaziken, or Mega Blaziken, Power-Up Punch is a really good move for gaining unstoppable momentum.
Replace Feint Attack on Shiftry with Knock Off. More power, more utility, just an all around great move.
Replace Spark on Magneton with a better special Electric move of your choice when possible. Discharge for paralysis chance, Thunderbolt for more damage, Thunder if you're not afraid of lower accuracy. Zap Cannon only if you're a true daredevil (I highly suggest not trying this).
Replace Pluck and Double Hit on Dodrio. Drill Peck is a better flying type move, Return or Thrash are better normal moves. Considering you already have Fly though you don't really need another physical Flying type move, so I would go with Knock Off for the utility, high damage on item holders, and more type coverage. If you want both Drill Peck and Fly, you can replace Pursuit with Knock Off, as it does more damage and no enemy ai trainers will switch out.