Name every item from Metroid games released before the year 2000. This includes Metroid, Metroid II: Return Of Samus, and Super Metroid (AKA the good one).
List from Metroid Wiki: https://metroid.fandom.com/wiki/List_of_items_in_the_Metroid_series
Even if an item appeared in multiple games, only it's first appearance will be counted.
Only upgrades to Samus's abilities, as well as her starting abilities, will be included. That means no energy tanks (or Reserve Tanks, which are a bit of a grey area on granting a new ability or not) or any other capacity increasing item. Also, the Justin Bailey outfit from Metroid will also be excluded, since it doesn't actually give Samus any new powers; it's simply cosmetic.
They really dropped the BALL on including her most iconic powers. Her and Link have SO much potential for moves and they just...don't include any of them outside of their special moves (okay Link has a small handful of sword techniques from the Zelda series but nowhere near enough. It's very sad.