Secret Swamp

Secret Swamp is the secret tenth level of Spooky Trails in Mario + Rabbids Kingdom Battle. It can only be accessed by completing Opening Night!, then returning to Slime Swamp to press the button so that the blue "maze" appears on the left, then use Beep-0's Smash ability to smash some rocks blocking the way.

Layout
The first part of the level is a small area consisting of several Smashers and Peek-a-Boos.

The next part of the level features a rematch against Calavera, who is surrounded by full cover. Supporters, Valkyries, and Boos also inhabit the area.

Enemies

 * Smashers
 * Peek-a-Boos
 * Calavera (boss)
 * Supporters
 * Valkyries
 * Boos (stage hazards)