Clone Drone in the Danger Zone

Ally Challege is a gauntlet setup of 10 matches, each one offering you ally characters that'll fight alongside you. It's among the easier challenges in the game, since for this scenario some enemy robots will focus their attacking against the allies instead of you. The allies you're offered are changed after each match, none of them carry along to the next one. Lastly, allies can be defeated by your own attacks like enemies can accidentally defeat their own kind. So go after any enemies you desire to eliminate that are well away from any allies. The achievement unlocks after you successfully beat the 10th and final match.