My turn! Emerald is usually a tactical fighter, using the terrain and surroundings (and possibly traps) to his advantage. When fighting a mechanized opponent, Emerald would normally go for easy strikes on the joint areas. His love of tactical fighting and having unexpected advantages is helped by the fact that he loves tinkering and modifying machines, whether it be Johnny's van, which Johnny may not allow, or a battle weapon, like a smoke bomb or bomb...bomb.
Also, he likes exploiting openings and causing seemingly superficial damage that is actually fairly important. He is also good at making openings, such as backing someone into the side of a rocky cliff (like the ones in the Kindergarten) and then causing a small landslide.