Were you asking about why he was used or what scene he was in?
Anyway, if you are asking about what scene he was from, he was in the orchestra, and after Miss Piggy falls into the orchestra, she accidently breaks his tuba. Miss Piggy aid, "My fall was fixed by Kermits love", and then he said "I wish Kermits love could fix my tuba". After that, Kermit said, "You bet, Eugene". He also had a line after rachel bittermen said something mean to miss piggy.
I think he was created for this movie. I think he was a bit unnessesary, and it's weird that they gave him a line (and had his name mention). If they needed extra musicians in the orchestra they should have just used Lips and Trumpet Girl, not create some new orchestra members (they also should have used Nigel The Conductor instead of some whatnot conductor). If they needed a big instrument for miss piggy to fall into, then just have her fall into Zoots saxaphone.