How do I get protean Greninja?
Protean Frogadier can be found in the Water-type Friend Safari, you'll need to have access to one of these or you must trade.
Everybody has either a Protean Froakie or a Protean Greninja. On your PSS, go to your shout out thing and say "LF: HA Froakie"
You're bound to get one soon