I hope this is the right subforum, since I haven't seen any other teambuilding questions...

I'm trying to compile a double battle team to use in the battle tower,
This is what I have atm:

Shedinja@Choice Band
Wonder guard
EV: 252 Atk / 4 Def / 252 Spe
Trick
Sucker Punch
X-Scissors
Will-o-Wisp/Protect

Blissey@leftovers
Natural cure
EV: 252 HP / 252 Def / 4 Sp. Def
Skill Swap
Softboiled
Seismic toss
Helping hand/Toxic

Swellow@Flame Orb
Guts
EV: 252 Atk / 4 SpD / 252 Spe
Protect
Facade
U-turn
Brave Bird

Tyhplosion@Choice scarf/specs
EV: 4 HP / 252 Sp. Att. / 252 Spe
Overheat
Eruption
Focus Blast
Hidden power grass/maybe electric

Shedinja is meant to pass his wonder guard to Blissey using Blissey's skill swap, though I tried to combinate it with trick, but I'm not sure if this combination works since protect might be needed in the first turn, and then he won't be able to sucker punch the next turn. Blissey gets wonder guard from shedinja with her skill swap, and has mainly defence EV's in case of fighting pokémon. Swellow is my physical sweeper, with guts/facade, and Tyhplosion is my special sweeper, with hidden power grass to counter ground/rock/water pokémon.

I don't know if this will work, so critique is welcome :D