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.
Pop seems to be in good terms with Toothy. His main interaction with him occurred in Read 'em and Weep, where Pop and Cub attended Toothy's yard sale and bought one of his books. Also as Pop as Cub went to Toothy's act in Class Act and then they enjoyed Toothy's singing.
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, Pop hires Handy as Cub's babysitter in A Handy Nanny.
In A Sucker for Love Part 1, Pop stared speechlessly at a crazed Nutty. After the squirrel had taken Cub's lollipop, Pop was ready to grab it back from Nutty's clutches. Note that in this episode, Pop was acting aggressively towards Nutty despite his calm nature. It's likely that, after this episode, Pop began to dislike Nutty.
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 disgusted 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. He also cheers on Sniffles’ death in Something Fishy
- 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.
Just like Cuddles, 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.
Pop and The Mole act very neutral with each other. Pop gets help from The Mole to help rescue Cub in A Hole Lotta Love and later asks him for help again in A Sucker for Love Part 2. He is also sitting and watching the play with The Mole in Something Fishy.
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 was also curious as to why Lifty and Shifty were running in Gems the Breaks.
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 by Splendid for unknown reasons, it could be for blowing his newspaper around with his flight, but Pop can be seen eyeing Splendid when he simply walks into the laundromat for the first time.
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 in Wrath of Con, 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, Flaky, Mime, Lifty, Shifty, and Flippy.