>>32548802>>32548802There are quite a few reasons why Regice falls as one of the worse options in a more unrestricted tier (like OU) where incredibly powerful legendaries, such as Kyogre, are banned:
1. Regice suffers from Ice typing, not only causing it to have numerous weaknesses and few resists, but also taking 25% from Stealth Rock upon switch-in.
2. Regice has no reliable recovery; this means it cannot recover well through moves such as Recover and must rely on either Leftovers or Rest, the latter of which is not a very good option for a mon that cannot keep advantage during those rest turns in ways CroCune can.
>Can Regice take hits well?Certaintly can special hits, to some degree
>252+ SpA Choice Specs Magnezone Volt Switch vs. 248 HP / 8 SpD Regice: 102-121 (28 - 33.3%) -- 93.1% chance to 4HKO after Leftovers recoveryNot excellent for a wall, however
>252+ SpA Choice Specs Tapu Lele Psychic vs. 248 HP / 8 SpD Regice in Psychic Terrain: 198-234 (54.5 - 64.4%) -- guaranteed 2HKO after Leftovers recovery However, not so well any physical chip damage, as demonstrated by a common offensive pressure/late-game cleaner Scarf Excadrill:
>252 Atk Mold Breaker Excadrill Iron Head vs. 248 HP / 0 Def Regice: 270-320 (74.3 - 88.1%) -- guaranteed 2HKO after Leftovers recovery or
>252 Atk Mold Breaker Excadrill Earthquake vs. 248 HP / 0 Def Regice: 169-199 (46.5 - 54.8%) -- 10.9% chance to 2HKO after Leftovers recovery Blissey/Eviolite Chansey work great as walls not only because of their base stats, but because of their decent Normal typing, and Softboiled recovery.