In Dynasty Warriors: Gundam and number 2, they don't fly around instantly like DBZ. Most of the fighting actually takes place on land in those games, excluding the space missions.
In Armored Core, there's quite some flying around, but you're very limited unless you run some infinite energy regulation. The weapons in Armored Core are also attached, so the weapon's don't just fall out of your giant metallic hand. You can discard them midbattle, but that's only used when you're out of ammo and want to move faster, and it happens by deattachment and not just opening the hand.