Welcome to Smogon! Take a moment to read the Introduction to Smogon for a run-down on everything Smogon, and make sure you take some time to read the global rules.
Swinub are in premier balls
Fletchlings are ultra balls
Litleo is ultra ball
Whishmur is premier ball
Fennekin are in premier balls
Tentacool in net balls
Klefki in premier balls
The rest are in pokeballs