As it turns out, Moogles, the adorable series staple, proved both stylistically and technically demanding.

Source: https://kotaku.com/final-fantasy-xvi-moogle-art-mature-story-1850495302

Each new mainline installment to the franchise may take place in a different world, but that doesn't stop Square Enix from including recurring elements in each title like Chocobos, Moogles, summons like Ifrit and Shiva, and magic crystals.

Source: https://www.cbr.com/ff-xvi-every-notorious-mark-completion-guide/

Moogles were all over this game and probably have the greatest appearance rate than most other entries.

Source: https://gamerant.com/final-fantasy-mechanics-only-used-once/