To emphasize my point, they're not there. As in, at all. Not with the items. Not with the characters.
These are the metroid related items:
\item\metroid\AsfMetroidBrres.pac, size:174080 off:2D3610DC
\item\metroid\ItmMetroidParam.pac, size:4032 off:2D38B8DC
\effect\assist\ef_metroid.pac, size:66528 off:2A1A0CA0
If this were real, it would seem to be screw attack and metroid assisst.
For comparisson, links bombs in the fake listing:
\item\linkbomb\ItmLinkBombBrres.pac, size:27808 off:2D27D97C
\item\linkbomb\ItmLinkBombParam.pac, size:3072 off:2D28461C
Actually, the metroid armour can still be under items, since what you found is only the AT.
look at this:
\item\stafy\AsfStafyBrres.pac, size:220384 off:2D5DD41C
\item\stafy\ItmStafyParam.pac, size:6624 off:2D6130FC
\item\resetsan\AsfResetsanBrres.pac, size:452192 off:2D433BDC
\item\resetsan\ItmResetsanParam.pac, size:242240 off:2D4A223C
\item\robin\AsfRobinBrres.pac, size:227296 off:2D4DD47C
\item\robin\ItmRobinParam.pac, size:4352 off:2D514C5C
\item\nintendogs\AsfNintendogsBrres.pac, size:83040 off:2D39DF3C
\item\nintendogs\ItmNintendogsParam.pac, size:2016 off:2D3B239C
\item\nintendogshi\AsfNintendogsHiBrres.pac, size:234144 off:2D3B2B7C
\item\nintendogshi\ItmNintendogsHiParam.pac, size:2656 off:2D3EBE1C
etc etc..