Rate my stall team.

[SoPro Outrage]

I like playing stall so I made a team, i'm not that great at building teams so please help improve it.

Chansey (F) @ Eviolite
Ability: Natural Cure
EVs: 4 HP / 252 Def / 252 SDef
Bold Nature
- Wish
- Soft-Boiled
- Thunder Wave
- Seismic Toss

Cofagrigus @ Leftovers
Ability: Mummy
EVs: 252 HP / 252 Def / 4 SDef
Bold Nature
-Toxic Spikes
-Will-O-Wisp
-Shadow Ball
-Pain split

Gliscor @ Toxic Orb
Ability: Poison Heal
EVs: 252 HP / 204 Def / 52 Spd
Impish Nature
-Earthquake
-Defog
-Toxic
-Substitute

Heatran @ Leftovers
Ability: Flash Fire
EVs: 248 HP / 252 SDef / 8 spd
Calm Nature
-Lava Plume
-Roar
-Toxic
-Stealth Rock

Celebi @ Leftovers
Ability: Natural Cure
EVs: 252 HP / 236 SDef / 20 Spd
Calm Nature
-Giga Drain
-Perish Song
-Recover
-Heal Bell

Rotom-Wash @ Chesto Berry
Ability: Levitate
EVs: 248 HP / 28 SAtk / 232 SDef
Calm Nature
-Volt Switch
-Hydro Pump
-Will-O-Wisp
-Rest