I can at least give you this much: SmashWiki's working on providing useful interwiki links out; that is, for additional in-universe information, links to appropriate NIWA members.
So Mr. Resetti has a link to ACWiki, Quick Attack to Bulbapedia, Diddy Kong to DKWiki, Isaac to Golden Sun Universe, Smart Bomb to LylatWiki, Petey Piranha to MarioWiki, Meta Ridley to Metroid Wiki, Wii to N-Wiki, Distant Planet to Pikipedia, Infantry & Tanks to Wars Wiki, PK Starstorm to WikiBound, Star Rod to WiKirby and Bunny Hood to ZeldaWiki, to provide an example per wiki. (We're still working on an arrangement with StrategyWiki, and Pikmin Fanon's content doesn't exactly relate, so they're outliers.)
Point being, NIWA wikis (including, of course, WiKirby!) are getting links FROM SmashWiki as well.