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	8/10
Agility	TS2:3/10 FP:5/8
Stamina	TS2:6/10 FP:5/8
Fire Proof	5/8
Shock Proof	8/8
Default AI	5 stars
Native TimeZone	1924-35
First Appearance	TS1 Story Mode
Relations	None
Games	All

Robofish appears in all three games. He is the only small character in TimeSplitters 1. He has high agility and is very hard to hit.

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 skull wide open!".
TS2 Gallery	The pesky pop-eyed piscine returns!	TSFP Gallery	Goldfish boy rides again!