Its only enabled for everyone if you dont read the instructions.
Numpad 1: Credits - 1000000 Credits
Numpad 2: Metal - 1000000 Metal
Numpad 3: Crystals - 1000000 Crystals
Numpad 4: Mega Hull - 50000 Hull
Numpad 5: Damage Hull - Hull nearly drained
Numpad 6: Mega Shields - 50000 Shields
Numpad 7: Damage Shields - Shields nearly Drained
Numpad 8: Mega Antimatter - 50000 Antimatter
Numpad 9: Drain Antimatter - Antimatter nearly Drained
Numpad + : Mega Logistics Slots - 1000 slots available for planet
Numpad - : Mega Tactical Slots - 1000 slots available for planet
Numpad / : Instant Develop Planet - Instant Develop Planet
Numpad * : Instant Research - Instant Research
Pressing Numpad 4 gives the selected unit a mega hull of 50,000, once it has 50,000 press numpad 4 to turn off the option, if you leave it on then yes the other side will have it as well when you move your mouse over the unit.
So just enable it on your side then once you have selected the units whether ships or buildings then turn it off.
Same applies to Shields and Antimatter, turn it on for your side selecting the units then once each unit has 50,000, turn it off, then go attack the other side.
Very simple, dont say it doesnt work as it does, tried and tested with several people.
I did read the instructions (or else I wouldn't be here). And even pressed 4numpad again to deactivate it. But the weird thing is that after a battle, some pirate ships arrive at my planet with 5000 hull... which was really weird. The cheat was deactivated.
And I am not claiming that doesn't work for everybody, just for me. I know you guys are quite annoyed with the "zomg my cheats dont works!!11" sorta of posts (I read those as well) but please have a little patience, something must be out of order right? Even if I am wrong...
Anyway, if that happens again, I will sure post a video or a record file. Thank you very much.