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Is there any reason to take Dragon Rush on Garchomp?
Carrying enemies long distances is already a double-edged sword, but the dealbreaker is losing the escape potential of Dig since the windup will make you pick up anyone who's chasing you. And the slow from the upgrade is useless since your targets are already either miles away from safety or miles away from your teammates unless you dragged them into a wall.
And what is the point of the "combo" with Dragon Claw? Why take two gapclosers if you're only going to use one of them?