Collect the indicated number of Pro Medals by earning all stars on a particular stage in one run to unlock the corresponding bonus. Note: There are fifteen Pro Medals in Career mode and ten Pro Medals in The Lab.

Chicken Joe costume: 4 Pro Medals
Chuckles The Chimp costume: 2 Pro Medals
Cock-A-Doodle-Joe costume: 20 Pro Medals
Hot Pink (Team Nasty member) costume: 8 Pro Medals
Joe Danger gamerpic: 5 Pro Medals
Joe-ronimo costume: 10 Pro Medals
Knight of Doom costume: 16 Pro Medals
Knuckles the Chimp costume: 13 Pro Medals
SE Pro Medal gamerpic: 25 Pro Medals
Sir Bonehead costume: 6 Pro Medals