I love both of these episodes.

I had to go with PP Pwnage with this one though. Billy the Kid is an amazing episode and I love the story that Tony and Kelly bring to the table. The whole plot of them owning the earlier rounds and winning the temple for the first Purple Parrots win makes this a very memorable and enjoyable experience.

Bandit Queen is a great episode too for Zac alone. Also, the earlier rounds were enjoyable and competitive. In the end though, I have to go with the legendary Purple Parrot win episode.