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Nah bro, Tigers are larger, faster and stronger than wolves, a wolf relies on it's brothers in order to win via cooperation, a tiger does not. So in a 1 v 1 battle, the tiger would beat the wolf.
Tiger against bear, depending what bear, lets assume a grizzly, then the grizzly would win, because they're stronger and have thicker skin than a tiger, while a tiger is more compact.
Now, bear vs Elephant, the elephant would most certainly crush the bear xD