"Spoil" as in taking a good care of your Pokémon? Yes, of course.
Besides the responsibility, I would for real give a hug to my Machamp daily (with some kisses optionally), to incentive him to be affectionate and loving with me and everyone else, simply the kind of Pokémon I find the perfect. And always, I would take the time to snuggle into Machamp's pecs, and feel them, while Machamp's wraps me, to also incentive him to like physical affection.
>>35789929That's why I always prefer to be versatile. Fun is felt by both the trainer and the Pokémon equally.