Not gonna make a post in the NU thread because it'd be a one-liner, but you forgot that 1) Croc would be running Bold in this scenario, and 2) tera ground cetitan isnt rly run rn lol, but regardless I'll calc it as if it was tera ground
252 Atk Tera Ground Cetitan Earthquake vs. 252 HP / 252+ Def Eviolite Crocalor: 168-200 (45.9 - 54.6%) -- 58.6% chance to 2HKO