Sidekick or 'Buddy' discs
Basically power discs like the circular ones, but when placed, a little AI controlled partner follows you around. These are characters who are sort of the 'side kicks' of Disney (Timon and Pumbaa, Pascal, Meeko, ect.) and follow you around. This could be for purely entertainment, or in more combat oriented sets, they might actually help you fight (Like Pumbaa charging or something)
Just a thought.