There are stickers in Super Smash Bros. Brawl that cannot just be picked up off the ground (or from the air). These stickers may be obtained through completing certain requirements.
Format:
Sticker Name
Unlocking Method
Phyllis (Animal Crossing: Wild World)
Complete All-Star mode on Normal with any character
Running Chibi-Robo (Chibi-Robo)
Clear Classic mode on Easy with any character
Ryuta Ippongi (Duendan 2)
Clear 100-Man Brawl within 3 minutes and 30 seconds
Boo (Mario Tennis)
Hit 900+ ft. in the Home Run Contest
Liquid Snake (Metal Gear Solid: The Twin Snakes)
KO 10 Alloys/Wireframes in Cruel Brawl
