Waiting to see how you manage to fuck this up, bud. Here's my prediction on what it should be vs what you'll do based on past experience:
What it should be
-Brief cutscene that introduces a pet system.
- Optional taming mini-game that can also involve some shenanigans with the harem
-Affection meter (visible or invisible) that affects the likelihood that your pet joins your party and influences combat
What it will likely be
-Twenty hour cutscene with unskippable back and forth with characters who just happened to be around even though story-wise it would make no sense
-Mandatory taming mini-game where you have to suffer through some form of keyboard abuse that might cause the police to show up at your door for domestic assault
-Combat continues to suck because despite rpgmaker being the easiest game engine to develop with, Zion manages to screw it up in the worst attempt at being "creative" with his creation. In terms of relevance, doggo does literally nothing to impact outcome, you're still forced to spam iron will and slog through 200+ hours of slapping a wet noodle against a brick wall.
But then, I've been wrong before, so here's hoping.