This is a pretty close battle of titanic Pokemon. Both of them rank up there as some of the strongest Pokemon in existence. Tyranitar is physically stronger than Garchomp, but he is not the quickest fighter in the batch. Tyranitar isn’t slow by any stretch of the imagination, but Garchomp was a true speedster. His claws could deal some serious damage to Tyranitar and his energy blasts could match up pretty well. I’d say that Garchomp would be able to claim victory. Garchomp wins.