>>39080897There's occasionally a palette swap version of evolved Yokai you can find later in the games, so while there are recolors they're not incredibly pervasive.
As for Jibanyan, yes there are a LOT of variants, but I'd put them into 2 groups: the "lazy recolors that aren't really present in the game since they're mostly event/promotion related" category, which are more akin to Hat Pikachu, and the "Jibanyan-likes that actually have unique backgrounds, details, animations" category, which is more like your Minuns and Pachirisus.