From The TimeSplitters Wiki

Robofish
Unlocked by	TS1: Challenge > 3-C Bowl them Over TS2: Challenge > Monkeying Around > Dam Bursters with Silver or better TS3: Default
Species	Robot
Size	Small
Accuracy	8
Agility	TS2:3 TSFP:5
Stamina	TS2:6 TSFP:5
Fire Proof	8
Shock Proof	5
Default AI	TS2: 3 TSFP: 2
Native TimeZone	Unknown
First Appearance	TS1
Relations	None
Games	All

Robofish appears in all three games. He is the only small character in TimeSplitters 1, and to a degree functioned as the game's mascot. He has high agility and is very hard to hit. Future Perfect is the first installment of the series where he says something in English instead of fish language.

TS1 Gesture	Jumps in the air, then runs forwards saying something in fish language.	TSFP Gesture	Parades around in circles and says "You're going down! I'm gonna bust your head wide open!".
TS2 Gallery	The pesky pop-eyed piscine returns!	TSFP Gallery	Goldfish boy rides again!