At Brawlball title screen, hold RIGHT+SELECT+B to unlock Boss Rush Mode where you can fight all 4 bosses in order.
Kirby Quest Crowns
To get a perfect score and a Gold Crown next to your score, you need to beat all enemies while the Turn Bonus is 2X. Otherwise you'll get a Silver Crown.
Medals
Win Medals to unlock the following modes and more.
5 - Field Frenzy
10 - Music Player
15 - Kirby Brawlball
20 - Kirby Curtain Call
25 - Dash Course
35 - Strato Patrol EOS
50 - Kirby Quest
65 - Game Album
80 - Checklist 1
100 - Checklist 2
120 - Checklist 3
140 - Checklist 4
160 - Checklist 5
186 - Survival Rush
