Ok, so.

The Power Rangers (season of your choice, though Mighty Morphin' and Dino Thunder would be cool) this includes the new movie.

This includes any Zords the Rangers have come across in their seasons, as well as their weapons and gear.

The Evolve monsters have access to wildlife to progress in their later stages.

Round 1: The battle takes place in a city and the Ranger's are given notice to prepare for battle with their gear, Evolve monsters have access to cover and places to evolve.

Round 2: Battle takes place on Shear and the Ranger's are dropped in via dropship without their Zords ready and must track the monster down, they know what to do in order to track and kill them. They have access to their weapons they wield normally while fighting basic minions. The monsters have the upper hand in terrain.

Bonus Round 1: The monsters start at stage 3, with additional buffs from wildlife permanently active. The Ranger's start in their Zords.

Bonus Round 2: Every Ranger season battles 5 of every Evolve monster at stage 3 at once together, with the buffs active as stated above, the Ranger's are all placed with different groups of each other and must fight their way to their teammates to form the Megazord