>>19391583Actually, you can do okay for both if you go Adamant.
Shedinja only ever needs its defenses if it is behind a Baton-Passed Substitute, and even then they are pathetic and often won't stand more than one hit. So Lonely and Naughty work nice as well.
Ninjask is extremely fast already (A neutral nature is enough to outspeed positive base 140) and will outspeed almost everything after a Speed Boost. So it doesn't really need Jolly.