These are the levels you play if you lose your first Showdown match.
There are secret levels 0 - -10. These bosses have one heart.
The levels have 10-15 Miis in each stage, and if you keep losing, you unlock the secret level that is below it. For instance, if you lose Level 0, you will have to beat Level -1. If you lose to Level -1, you have to beat Level -2.
Bosses[]
Level 0: Geoos
Level -1: Melon
Level -2: Muxani
Level -3: Maxi20
Level -4: Wogel30
Level -5: Fasbi
Level -6: Sary
Level -7: Leng-kuh
Level -8: Gary
Level -9: Maxmillian
Level -10: Very Small Male Mii
In Level -10, your opponents are very small Miis. You can kill them with one hit.
A male Very Small Mii
A female Very Small Mii