The Muppet Show was a TV show that ran in America between 1976 and 1980, created by Jim Henson and his merry band. It had hand puppets called "muppets" doing skits, and often including celebrities.
Statler and Waldorf comment on mecha shows in /m/Statler and Waldorf are two old geezers who would sit in the box and offer their own comments on the show as each episode ended. Overdose video here
The Newfag Summer of 2007 had a horrible impact on the quality of the 4chan image boards. Right in the thick of it, though, there was a moment of reprieve. One day (it was probably June 2nd 2007), an Anonymous went across all the image boards and created Statler and Waldorf dialogues relevant to the board at hand. As the best kinds of trolls - they are funny and hate everything equally, even what they do themselves - they were embraced in a childhood-rekindling sweaty hug. Other Anonymice improved, destroyed, created new and recycled old dialogues.
The key to writing a good Statler and Waldorf dialogue lies in customization and characterization. Replacing "this [edition of the Muppet] show" with "topic A" in a dialogue lifted straight from The Muppet Show can work, but this often gets old or falls completely flat. Taking a true characteristic of "topic A" and having Statler and Waldorf use it to put it - and themselves - down *might* be funnier.
