http://replay.pokemonshowdown.com/oubeta-69568138
Recent replay showing the importance of leftovers + a recover move for a bulky wall considering infestation
Admittedly, this won't happen every time and the battle would have went much differently if charizard had solarbeam or greninja had grass knot but the fact remains that not focusing solely on infestation makes this wall much more powerful. Consider having quagsire on your team with the following moveset:
Quagsire @ Leftovers
Ability: Unaware
EVs: 252 HP / 252 Def / 4 SAtk
Bold Nature
IVs: 0 Atk
- Stockpile
- Scald
- Recover
- Infestation
0 atk iv's to lessen damage from confusion, which isn't ideal to get in reality but should be used in the simulator. Stockpile is essential so that damage taken can be reduced which leads to burns/infestation. For me, quagsire has often lead to a mini sweep if potential grass attackers have been removed.