Hopefully this is right:
Battle Format: 3 vs 3 single.
Battle Style: Set.
Disqualification: 3 days.
Damage cap: 34%.
Banned moves: OHKO moves.
Arena: Icy Fjord.
Whilst warm and near-tropical for about a month, the Icy Fjord is a large valley, carved by a body of water which freezes over for 11 months of the year. However, in July, the ice melts allowing the fjord to continue expanding. If the move Sunny Day is used, the fjords shall melt causing fast flowing water to pull away any Pokémon unfortunate enough to be in or below the water. When Sunny Day comes to a halt, the Fjords shall freeze over again, trapping any Pokémon that happens to be below the waterline. Ice moves have a 3% power increase and a 3% energy cost decrease in the "winter" fjord, whereas water and fire moves have a 3% decrease in power and a 3% penalty for energy cost. In the "summer" fjords, water moves have a 3% increase in power and a 3% decrease in energy cost. However, ice type moves have a 3% decrease in power, and a 3% energy penalty cost.
Simplified:
Summer-type weather: +3% power, -3% energy to water moves. -3% power, +3% energy cost ice moves.
Winter-type weather: +3% power, -3% energy to ice moves. -3% power, +3% energy cost to water and fire moves.
If a pokémon is on the ice when the weather changed from Winter to Summer, then they take the same ammount of damage from a Whirlpool attack.
If a pokémon is in the water when it freezes over, they gain the frozen status.
All weather effects, such as Sunny Day would still have the same effect in the arena.
Additional rules: None.
Profile:
Link.
