Chansey @ Eviolite  
Ability: Natural Cure
EVs: 4 HP / 252 Def / 252 SpD  
Bold / Calm Nature
IVs: 0 Atk / 30 Def
- Softboiled
- Heal Bell
- Transform / Whirlwind  
- Wish / Seismic Toss / Toxic
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Optional Move(s):
- Super Fang
- Glare
- Rapid Spin
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Overview:
Chansey's huge HP stats and a great special bulk combined with Eviolite allows it to check a lot of special attackers in the tier. Access to a good utility move such as Rapid Spin, Heal Bell, Glare and Transform, allowing it to support its teammate by curing status, crippling or scouting opponents. However, its low Defense stat, even with heavy investment and Eviolite, still leaves  it prone to a lot of physical attackers and mixed attackers such as Primal Groudon and Primal Kyogre. Its reliance on Eviolite makes it vulnerable to residual damage such as Stealth Rock, item removal such as Knock Off and is heavily vulnerable to trappers such as Mega Gengar and Gothitelle due to its passiveness and inability to hold Shed Shell. It also struggles fitting all of its utility moves.