Is that Ditto we're talking about? Yeah, I think they tried to make it somewhat useful, but it didn't work haha.
Hmm, new popular things to use which you could look at include Whimsicott, Deoxys-S, Terrakion, D'nite, Rotom-W, Roserade, Ferrathorn (almost every team has one... personally I hate it), Rueinicluse (spelt wrong), Leavanny, Eelektross, Latias, Jirachi (has become a lot better in this generation)... There's quite a few more, but that should do for now haha.