I don't really understand the point of this set. If Silvally had self sustain or could run leftovers here sure. but really I think it just makes more sense to go:Finally, on the defensive. I think this is the area where Silvally will probably be the least impressive, but there is potential. This again revolves around Parting Shot and U-turn. Those moves alongside T-Wave, Roar and Toxic are the extent of Silvally's defensive potential. If Silvally can check enough threats and not be outclassed by other Pokemon of the same type, sets like the one below should be solid. Otherwise, defensive Silvally won't be relevant.
Silvally @ Ground Memory
Ability: RKS System
EVs: 252 HP / 252 Def / 4 SpD
Impish Nature
- Thunder Wave
- Multi-Attack
- U-turn / Parting Shot
- Toxic / U-turn
Silvally @ (Filler)
EVs: 252 HP / 252 Spe / 4 Def
Jolly
~ TWave
~ Multi-Attack
~ Parting Shot
~ (Elemental Fang or Utility like weather setting)