If you meet a Trainer with a Nincada or any of its evolutions, ask them how old the Pokémon is. If you know Nincada brood emergences by location, you can correctly guess where the Trainer is from 98% of the time.

Ninjask’s association with ninjas is misinterpreted in modern media. Rather than keeping Ninjask by their side, most ninjas use its screaming as a loud distraction far away from their actual target. An adept Ninja can command a Ninjask from over half a mile away.

More mysterious than Shedinja’s sudden appearance is the lack of any wild specimens. The most accepted scientific theory is that Shedinja is the trusted bond between a Nincada and its Trainer possessing its discarded husk.
Pokéfeature: Shedinja’s Max HP is always 1.