>>35949213Conceptual art pre-SM was pretty barebones. Greninja's shows off how it actually fights and poses, compared to a lot of other mons which are just shown in neutral positions or some (rarely) in a generic battle stance.
Greninja's shows it resting under a tree, doing a ninja pose, and showing off how its water shurikens work. It actually shows off how the mon would fight, and looks cool in the process.