This article focuses on the interactions between Pop and every other main character he has interacted with so far.
Considering the time he spends with Cub as a father figure, Pop rarely interacts with other characters. In fact, the only prime example of Pop getting along with characters other than Cub is in A Vicious Cycle.
The closest they have come to an interaction would be in And the Kitchen Sink, where Pop accidentally runs into Cuddles with his car.
The only time Pop has interacted with Giggles is in Every Litter Bit Hurts, where he is hired by Giggles to remove trash from the lake. He and Cub also sat behind Giggles in Wingin' It, Pop doing nothing as his son annoys Giggles by playing with his toy plane.
Their closest interaction with each other is in Read 'em and Weep, in which Petunia attempts to sell cookies to Pop before she gets attacked by The Demon. They're also seen holding hands in Class Act.
Handy and Pop appear neutral in terms of each other. In A Hole Lotta Love, where Pop failed to understand Handy's directions, the latter was angrily annoyed. However, they were later seen sitting and watching the play together in Something Fishy. Pop also hires Handy as Cub's babysitter in A Handy Nanny.
Their only main interaction is in A Hole Lotta Love, where Pop grabs Sniffles by the chest and shakes him demanding for Sniffles to help save his son. He later pressures Sniffles while he is working and starts a fight with him over who should drive the drill machine (in Pop's defense, these acts could have been done out of stress rather than hate, as Pop was evidently horrified at Sniffles' death). Although in Who's to Flame?, he doesn't seem to care for Sniffles' death in the slightest, even kicking away one of his limbs.
- Main article: Pop-Cub Relationship
Being father and son, Pop and Cub clearly love each other like a family should, and they're always seen together when they both appear in the same episode, seen having a relationship with each other.
The closest thing of an interaction between the two would be And the Kitchen Sink. Flaky nearly gets run over by Pop while she was trying to cross the road, but ends up getting herself killed by him and Cub nonetheless.
So far, they have never interacted face to face. However, Pop most likely dislikes Mime because of the events he caused in Mime to Five.
Pop is most likely enemies with the duo. He has never actually witnessed a robbery from Lifty and Shifty. He did, however, see Lifty run his son over with a truck in As You Wish.
Pop most likely sees Fliqpy as an enemy. He saw Fliqpy die in A Vicious Cycle and rewarded the cops for their work by inviting them into his house.
In From Hero to Eternity, Pop is clearly annoyed after Splendid nearly blows away his newspaper several times. However, he didn't seem to mind Splendid interviewing him in See What Develops; though he most likely didn't recognize him in his disguise. He even takes Cub to hear Splendid's speech, despite not being fond of Splendid himself.
- Pop has not yet interacted with Russell, Lammy or Mr. Pickels. He has also not directly interacted with Cuddles, Toothy, or Flaky.