Ok, I know how to ally with Grox But, it's nearly impossible! First of all, requirments: Super Happy Ray Planet Buster (5) $400,000 Sporebucks Interstaller Drive 5 Lots of Enery and Health Packs(To heal and recharge during missions and SHR)(Super Happy Ray)
Once you've gotten everything you need, start doing Missions for them until you get +50 rep. Next, pay them 400,000 sporebucks for +10 rep. Next, planet blowing up time! Use them on 4 planets (Not Grox or you lose rep!) and you will get +50 for breaking the "Galactic Code" Use the Super Happy Ray until you get +30 rep. Once you do all that, it should probably be green with them. Still, you're not allied. Next, get a Trade Route. Last, ask them for a ship to lend into your fleet. You are now allied! However, everyone you see will have -200 rep for allying with them, and war. Even your previous allies are worst enemies now. But, you have a 3,600 HP Grox ship in your fleet and you get the Dance with the Devil badge. Thanks, and don't get yourself killed! P.S, Scanning anything Grox will be deleted off Sporepedia in a minute or two.