EatChildren
Currently polling second in Australia's federal election (first in the Gold Coast), this feral may one day be your Bogan King.
So I'm tempted to just scan all those cards, but then I'm thinking that maybe those are rewards for doing things? And I like it when I get rewards, so maybe I don't want to scan them right away...
<sigh> the decisions.
Scanning cards earns you a 'trophy' of that character/object, and you can unlock many of these normally throughout the game, either by meeting certain stage requirements (time/damage/difficulty), or by gambling for new idols (think like the coin machine in SSB Melee).
So yeah, scanning the cards will skip a lot of that.