Flashback: In the "Polliwog Day Song", there were scenes from the first 3 seasons and even the fourth season.
Grand Finale: This is the final episode of the whole entire series. This episode even ends with "Polliwog Day Song" featuring flashbacks from Seasons 1, 2, 3, and even 4 episodes.
To the Tune of...: "Polliwog Day Song" uses the tune of "Move Your Body".
