Emerald Link-Battle team.

[Envoy Eon]

Swampert (M) @ Leftovers
Trait: Torrent
EVs: 240 HP / 228 Def / 40 SAtk
Relaxed Nature (+Def, -Spd)
- Curse
- Earthquake
- Ice Beam
- Toxic

Zapdos @ Leftovers
Trait: Pressure
EVs: 220 HP / 152 Spd / 136 SAtk
Timid Nature (+Spd, -Atk)
- Hidden Power [Ice]
- Rest
- Sleep Talk
- Thunderbolt

Dugtrio (M) @ Choice Band
Trait: Arena Trap
EVs: 4 HP / 252 Atk / 252 Spd
Adamant Nature (+Atk, -SAtk)
- Aerial Ace
- Earthquake
- Hidden Power [Bug]
- Rock Slide

Celebi @ Leftovers
Trait: Natural Cure
EVs: 248 HP / 156 Def / 28 Spd / 76 SDef
Calm Nature (+SDef, -Atk)
- Baton Pass
- Calm Mind
- Psychic
- Recover

Regice @ Leftovers
Trait: Clear Body
EVs: 252 HP / 168 Def / 32 Spd / 56 SAtk
Calm Nature (+SDef, -Atk)
- Ice Beam
- Rest
- Sleep Talk
- Thunderbolt

Skarmory (F) @ Leftovers
Trait: Sturdy
EVs: 252 HP / 56 Def / 24 Spd / 176 SDef
Bold Nature (+Def, -Atk)
- Rest
- Sleep Talk
- Spikes
- Whirlwind

[Venny]

If these pokemon haven't already been raised, you may want to give up on hidden powers. The odds of getting the IVs required for the right hidden power and then of a good power are so low... combine that with getting the right nature/ability and getting the hidden power you want is damned near impossible... Unless you can gameshark IVs, which I'm not sure if you can. I'm assuming you have some kind of cheating device if you got celebi on your team.

Give swampert rest over toxic. Curse-pert can be a good way to close up a game if it can heal itself. If nothing else, maybe hydro pump/rock slide? Toxic on swampert is just... meh. Hydro pump/Surf will at least help you against skarmory, cause any skarmory with rest can stall your ice beams forever. Hydro pump/Surf + ice beam also makes swampert a better calm mind target for celebi if you needed to.

Edit: I notice you have a lot of slow guys on your team... I would suggest making either zapdos or regice into a thunder-waver. You have a lot of S-talkers already. I think losing one status absorber for a t-waver would be worth it.

[chaosmage]

3 Sleep Talkers is overkill imo.