1. Why was only Poppy's father showed in the movie & her Mother wasn't even mentioned? Same with King Gristle - only his Father was showed & Mother was Never Mentioned ( Have you wondered about that too? )

- The most obvious answer is: Their mothers were not created by the movie makers because those characters were not necessary for the plot

- The other possibilities are: Were they dead? or they were somewhere else in their Fathers' scenes? ... will they appear in Trolls 2 ? - We will see... 

2. Why was Only Poppy's Father showed & the Parents of the Other Trolls were not? - I really Don't Know, but I thought about that question.

What do you think? - Tell me in comments, please