Unicron is pure evil and also known as chaos bringer in the Transformers universe. Unicron has no allegiance to either the Autobots or Decepticons.
The packaging from Takara. Unicron in the Armada series resembles the one in G1 in term of colour and details
Unicron and his accessories are well secured with countless of wire strips. I think I spent almost 40 minutes just to get all those wire strips off.
Unicron's alternate mode is a mechanical planet. He is about the size of earth and is capable of devouring other planets via its massive mouth.
In Unicron's alternate mode, he is capable of holding a massive 30 Mini-Cons (including his storage chambers) at a time.
Unicron also comes with a Mini-Con unit called Dead End. Interestingly, Dead End transforms to a sphere which looks like another mechanical planet/moon just like Unicron.
Unicron's robot mode stands at almost 45cm tall. This is the biggest and heaviset Transformers I ever had.
Overall, Unicron can holds up to 10 Mini-Cons at a time in robot mode (not taking into account his spike)
This is the size comparison between Unicron with Optimus Prime, Optimus Prime Super Mode and Galvatron (all from the Armada series)
Unicron's profiles is unbelievable. Everything is infinity which suggest that he is almost indestructible. Notice Unicron bears the Mini-Con insignia. Mini-Cons are actually formed from Unicron's cells to intensify the war between the Autobots and Decepticons so he can feed off the hatred from both parties.
By the way, there is rumour that Unicron will be introduced in the next installment of the Transformers movie. Let's wait in a couple more years and see how the movie Unicron will turn out to be.