What kind of link could that be? I'm prolly guessing it links up to other Best Rich products, if any. Since it's a game for GB/C that means it only links to other Digimon games, which to my mind only comes Yong Yong's platformers and Vast Fame's RPGs. Looking by the screen shots in the site i'm probably guessing it's some kind of virtual-pet rpg thingy like neopets did, right? Well, VF RPGs seem to be the most reasonable communications. Or perhaps even other Digimon 6 games.
BTW, is that english? And, is it dumped? Because how would the site be able to take shots, then? I wonder if english is the only language it's available in.