For Coloursfall, except actually canon.
Format: 2v2 doubles
DQ: Two weeks
Damage Cap: 40%
Banned/Restricted Moves: OHKOs, direct healing, perish song, attract
Arena Description: Nux Walpurgis
High over Mitakihara, a city full of modern architecture and glass-covered skyscrapers alongside peaceful rivers and grassy hills, comes the night of Walpurgis, a powerful witch as destructive as a storm or natural disaster. She laughs as she spins helplessly in circles and brings nothing but destruction in her wake.
Perhaps two trainers with armies of pokemon at their disposal would have been enough to stop her. Perhaps, if they hadn't set their eyes upon her and seen a different sort of opportunity. Instead, they allow her to tear buildings apart and spew fire at the young girls who futilely struggle to stand against her, all of that just serving as the background to their own battle.
The battle takes place on top of
the upside-down witch that is slowly flying over Mitakihara. Fortunately, the massive witch provides a wide stage in the form of several gears at her base. The largest gear has a roughly 50 m diameter. In the middle, there is another 20 m gear forming a raised platform, and in the middle of that is a small 10 m gear, just large enough for all pokemon to be sent out on. The gears slowly rotate in the opposite direction of the gear just above/below it, though not quickly enough to be a hindrance to most pokemon.
A strange power distorts time and space around Walpurgisnacht so that pokemon can't leave the arena. However, it means that no one can fall off, either. For moves requiring natural resources, if they are available from elsewhere in the city, this power will also draw rocks/water/etc into the arena so that the moves can remain successful.