Board Thread:Improvements and Issues/@comment-15519592-20150125090311/@comment-15519592-20150125181304

There are 0 hollows killed on page in the short flashback that covers the destroyed colony, and the only arm we see is clearly not human shaped, ergo, not an Arrancar. He also killed a couple hundred hollows, Nnoitra's own words, and there is no way in hell there were a couple hundred Arrancar, natural or otherwise, in that colony. I can conceded maybe one or two naturally evolved ones, as unlikely as that is giving their extreme rarity, but definitely not a couple hundred. (Chapter 312)

The Arrancar Nnoitra killed was in a later flashback in a different chapter sometime after the colony incident, and judging by the very obvious uniform the dead Arrancar is wearing, one that was already a part of Aizen's operations. Regardless of loyalties, said Arrancar was NOT killed as part of the Colony massacre and took place at an obviously later date, out in a very open area nowhere near any colony. (Chapter 313)