It must be noted that Pokemon doesn't exactly play this trope that way: see its entry in Strictly Formula for details. Team Rocket does play the trope straight, however, whenever their scheme involves some kind of robot.  ^*

^{though they avert it with their actual Pokemon roster, which rotates about Once A Season on average, making that more So Last Season.}

The trope is also played straight in episodes featuring Gym Leaders and Contests, wherein the Mot W is usually the opponent's monster that causes our hero's team the most trouble.

In fact, the details on Strictly Formula are so... strictly formula that whenever a Pokemon causes trouble on its own (i.e. without interference from Team Rocket) and plays the Trope straight it may count as a Double Subversion.