Like Mario Bros. and 25m in Brawl, and others before them.
1. Bowser's Castle - made up just like the ending of a Bowser's Castle in SMB, complete with an 8-bit Bowser throwing fireballs and occasionally hammers at you. If someone hits the switch, the bridge collapses, causing Bowser to fall in and disappear. This also leaves the lava open for others to take damage from and very little fighting space. After 20 seconds, the bridge and Bowser blink back in (like a reversal of an item disappearing), but don't solidify until every fighter is out of a spot where they would be trapped under the bridge.
2. Mountaintop - Literally the top of a mountain from Ice Climber, complete with a condor that you can jump onto. But he may fly off the stage at any moment, and very quickly, so you might die! Since Ice Climbers really don't need two stages, this can be their representation for this game.
3. Temple. Since the ever-polarizing Temple stage is based off of Zelda II, recreate it exactly using 8-bit elements to make it look like it was pulled directly from the game. That way it can be in but doesn't have to take up a retro-stage slot. --- darkx remembers his friend, GrapefruitKing. RIP :( Support Shantae 4! http://www.kickstarter.com/projects/1236620800/shantae-half-genie-hero