From The TimeSplitters Wiki

Koozer Mox
Unlocked by	Honorary League > Deadweight > A Pox of Mox bronze or better
Species	Mox
Size	Normal
Accuracy	N/A
Agility	5
Stamina	5
Fire Proof	5
Shock Proof	5
Default AI	2
Native TimeZone	2280
First Appearance	TSFP Arcade Mode
Relations	Meezor Mox, Ozor Mox
Games	TSFP

TS1 Gesture	N/A	TSFP Gesture	Stomps foward and stays "Just show me where to shoot."
TS2 Gallery	N/A	TSFP Gallery	After the Meezor Mox and Ozor Mox battled each other to extinction, the Koozor Mox (who were, to be fair, playing a waiting game) took over.

The Koozer Mox are one of the species of Mox that inhabit Planet X. They waited for the Ozor Mox and Meezor Mox to fight each other to extinction, then took over.

Appearance

The Koozer Mox look similiar to Ozor Mox but they are blue skinned instead of green. They also speak with a robotic voice.

A Pox of Mox

The Koozer Mox is unlocked in the Zones Challenge called A Pox of Mox. The mission breifing reads:

The Spaceport has been invaded by the dreaded Koozer Mox but fortunately for the authorities, the latest Gretel combat droid just happens to be passing through on her way to Eridani 3 for some R'n'R under the triple suns. Well now they've spoilt her holiday so it looks like she's gonna be whippin' their blue alien hides in return.