Unicron

The Chaos Bringer - World Eater (1:8,448,000 scale)

Unicron doesn't transform.  The planet mode is a completely separate mode. 

Sizing: Unicron is 7.5in to the top of the head in robot mode.  Unicron planet is 6.3in tall.   Custom Kreon Size Comparison 4

Unicron - click on the picture to view the larger version


Unicron planet mode - click on the picture to view the larger version


"Behold, Galvatron", Junkion ship VS Unicron - click on the picture to view the larger version


Unicron head and "Ghost in the Machine" (Ok, Metroplex didn't fight Unicron but might've if Unicron got his body back.)