How can one provide good enrichment for a Greninja?

bland-pokemon-headcanons:

Greninja are hunters, so they like activities they can chase. I’ve heard of trainers using feather toys (a bit like a cat toy), remote-controlled cars, and good old fashioned games of tag with much success.

They are also fascinated by lights, so disco balls and repurposed Christmas lights will provide hours of entertainment. Avoid laser pointers, though. They have been associated with severe eye problems.

With their front limbs being hands, video games are also a possibility if you modify the controller to work for their number of fingers.