Originally Posted by goldwynaut
What if Spheal is holding NeverMeltIce or glacier plate? Also please stop talking about critical hits and such, those are nearly travial factor because they can not be used in a 'real' strategy, even though there critical hit ratio boosting moves and items, they are still very luck based, and a strategy based on critical hits will therefore be very unreliable.
Spheal would still have to tank the previous 4 turns of Ice Ball to use its fifth, disregarding its Defensive increase with Defense curl.
If a Physical Wall/Special Sweeper were to switch in (ex. defensively beefed up Magnezone), a STAB Thunder/Thunderbolt would roughen up your Spheal severely before the final Ice Ball and potentially KO it with ease.