http://youtu.be/9YsAyO9oW00Water type.
The ground would get sliced, shifting the path and forcing the player to find a new one.
Gym layout would have the player running up a stream with a waterfall at the end, where I'd be waiting.
Team would be:
>Politoed>Frogadier>Milotic>Seismitoad>SamurottThen World Revolution played, and then Corridors of Time.
God damn I could sit here making themes for every Chrono Trigger song.