Everstone is for breeding. Read up on it and you'll know what I'm talking about. You must have emerald to get seismic toss, or FR/LG. Ice beam can take its place. Here:
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Trait: Natural Cure
Bold Nature
EVs: 252 HP, 252 Defence, 6 Special attack/defense
~Seismic Toss/Ice Beam
~Aromatherapy
~Softboiled
~Thunder Wave
or CM Bliss
Same
EVs: 252 HP, 200 Defense, 58 Special Attack
~Calm Mind
~Ice Beam
~Thunderbolt
~Softboiled
Those are the two best blissey sets I know.
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Why are the beautiful sick and divided like myself?