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All shitposting aside, the game does hand you the tools to be jacked as hell even in the main story without having to go out of your way.
Remember, for every gummi you find, you get at least 1 stat boost in RT and Sky-- although in RT's case you can't buff up the protags that way until postgame.
For RT, certain dungeons you go through in the story, notably Uproar Forest, have a ton of gummis lying around. While the protagonists can't make use of it, if you have a favorite recruit, dumping it on them allows them to gain stats real fast effortlessly. Monotype mons likely won't get important skills though, but due to the way dual type Pokemon and gummis work, you can get some pretty important skills real fast if you pick a mon like Wooper (who I'm pretty sure is a popular pick here, partially for that reason). Postgame lets you use said recruit freely, too.
The game encourages this playstyle, even, with Super Mobile and Buried Relic, the latter being one of the first postgame dungeons tied to the plot. Buried items can only be found by crushing through walls or by using a Ghost-type Pokemon/Mobile Scarf, but the latter kills your belly fast in a 99F dungeon, which is obviously not recommended.
In Sky, Kecleon Shops now sell gummis and you'll find far more lying around on the ground. Unlike RT where the shops had some pretty noteworthy items like Huge Apples or Joy Seeds, the only thing of note in Sky's are the gummis, so you likely won't be using any items on anything else. The buffs you get in Sky are a lot bigger due to Spinda's Cafe sometimes having miracle drinks, which buff your stats up immensely. Unlike RT, though, you're tied to the player/partner duo for far longer, so you likely have to leave the partner behind in buffs if you're solely focusing on IQ skills, but you can balance out the spreads if you prefer having a meatier duo statwise.
Regardless though, the game definitely gives you the tools.