Yeah, it's a move that lets you carry any stat boosts to another Pokémon. So if you set up a ton of swords dance, you can pass the attack power on to another one.

[Riku nods, though. That's a pretty fair assessment.]

You have to consider team synergy, the terrain, the timing of your attacks. Protect's basically mandatory for double battles. Moves like Fake Out are probably handy for it, too.