Setting: Empty open-air arena
Notes: Palkia cannot advance warp reality, but can do what he did in the Pokemon movies (except maybe home-made pocket dimensions) Palkia also can exhibit it's full reflexes.
In character for both
MetalTyrannomon cannot damage Palkia's shoulder gems, as this would cause too many additional varibles.
No flaming, and good luck to all!
Also, according to OBD, Palkia without reality-warping is multi-city block, and powerscaling MetalTyranno to the similar MetalGreymon makes him about town/small city.