Outnumbered vs Outmatched

One man CAN take down an army, if he knows the weaknesses of the individual soldiers

I can completely wreck the entire Pokémon League with just these four - for those unaware of Gen VI Pokés, that sword and shield I'm holding is a Pokémon, too - enabling me to use the other two party slots and EXP Share to evolve other Pokémon into existence for Pokédex entries.  If I ever thought to teach my Xerneas "Night Slash", I could probably remove Aegislash from the equation, as he's only used to take down Diantha's Mega Gardevior.

Please note that the Trainer-and-Aegislash image was someone else's artwork - I merely color-edited it to match my ingame Trainer and then put the other three Pokémon in.

I'm planning on adding the Pokémon League members and their teams to this image, just to show the whole "outnumbered" bit, but right now I'm in a time crunch.