You (pokémon or human) were wandering the forest when suddenly, a Squirtle jumps out of the bushes and stops you. It looked mad.

"Squirt squirtle-squirt squirtle?!" (Who are you?!)

The squirtle wore cool shades. You notices there were 4 other Squirtles hiding in the bushes, not very well, and they had much less cooler shades, so this must've been the leader of their group. And if the leader of a group was mad at you, that would mean something really bad's about to happen.