From The TimeSplitters Wiki

Beetleman
Unlocked by	Elite League > One Shot Thrills > Double Bill Silver or Better
Species	Mutant
Size	Small
Accuracy	8
Agility	6
Stamina	4
Fire Proof	N/A
Shock Proof	N/A
Default AI	4
Native TimeZone	Unknown
First Appearance	TS2 Arcade League
Relations	None
Games	TS2

Beetleman only appears in Double Bill (Chasm), along with The Impersonator. He is a short character, with a face very much like The Impersonator's. According to the briefing of Double Bill, he is a parody of The Beatles.

TS1 Gesture	N/A	TSFP Gesture	N/A
TS2 Gallery	A hideous alien grafting experiment gone wrong, Beetleman fights out of rockabilly rage at what was done to his once beautiful body.	TSFP Gallery	N/A