>>18181067Shell Bell is very gimicky, usually you'd prefer leftover since you get recovery on switch-ins/setting up/opponent stalling with protect.
Pokemon with high HP won't benefit from it at all, while Pokemon with very low HP would prefer to use a sash or an offensive item.
That said. Iv'e seen people use it on wifi due to Gamefreak's item clause, and it's pretty good ingame.
