Given that the 6th generation rules heavily restrict the use of extra deck monsters unless you are using link monsters, will Yusaku have an ability to allow(make) others work together when they otherwise couldn't (wouldn't)? (And it doesn't seem to have much effect on natives of Pendos...)
Yes, through his “Link Ability”. Link abilities differ though from each Cyber, from Heart Link (All fighters connected to this link will sense each other’s emotions, and also make them work together better), to Mana Link (All fighters connected to this link will share mana from a Cyber). Each Cyber also has a Link Limit (Yusaku can only link with 3 fighters).