Chimchar. Close Combat is a killer in-game, and even tough it sucks at taking hits, I would prefer having a CC Infernape rather than a Rapidash. It is just more useful, in my opinion.
"Torterra is a really good choice to use against Bertha in the elite 4 because generally grass is super effective at least 2x against her Pokemon, and sometimes 4x, all while Torterra isn't being damaged by Sandstorm. The downside is that water becomes neutral, but the upside is that so does fire."
As far as I know, fire is neutral to ground, so in that case, Torterra still have a weakness to fire, right?