Since EP002 Team Rocket has always given us some kind of motto each time they appear. And, each time they perform the motto, we can see at least once all the Rockets (or just Jessie and James) posing with the "R" behind them.
The thing is that we've had many awesome motto moments regarding the animation (I'm not talking about the mottos themselves, just the animation). I challenge you to post here your favorite Team Rocket's motto screenshots!
I suppose you can also include Butch's and Cassidy's mottos and other kind of mottos we've had in the series, even those without any kind of "R" (which are a lot, particularly during Sinnoh).