How many storage boxes does Advanced tier give?

Storage matters in Aniimo because of the gap between what you can catch and what you can field. The game launches with over 90 basic catchable creature forms, and an active combat team holds four, which you swap between during a fight. Everything else you catch is sitting in boxes. Five extra boxes is room to keep duplicates, spare elements and half-raised creatures instead of releasing them to make space.

The boxes come with the $10 Advanced Companion Handbook, so this is a paid tier rather than something you earn in play. On console, the Advanced Edition pre-order bundles that same standard battle pass tier along with exclusive in-game accessories. If you pre-ordered that edition, the storage is already yours and there is nothing else to buy.

Advanced against Collector's

The Collector's Companion Handbook includes ten additional boxes, twice what Advanced gives. If storage is the reason you are choosing a tier, that is the comparison to make. Advanced is the cheaper entry and gets you breathing room; Collector's is the one to take if you expect to hoard.

Not settled: How many Aniimo fit in a single box is not settled, so five boxes does not yet translate into a specific number of extra creatures you can hold.