I had an amazing battle with Sceptile, Golem, and Vaporeon going up against some guy's Salamence, Blaziken, and Heracross on Emerald before, one of my proudest wins tbh. The battle facilities in B&W though are hard as hell imo.
Nice i prefer a somewhat quick battle strategy. Also, minimum damage taken is good. I discovered that in emerald, if you rent the sceptile for the battle factory and use leech seed, then moves like protect and leaf blade alternatively, you win easily. Sceptile has a leftovers hold item.