Pause game play, select the "Extras" option, then "Enter Code". Then, enter one of the following codes to activate the corresponding cheat function.

Effect	Code
Characters
Alfred Pennyworth	ZAQ637
Batgirl	JKR331
Bruce Wayne	BDJ327
Catwoman (classic)	M1AAWW
Clown Goon	9ZZZBP or HJK327
Commissioner Gordon	DDP967
Fishmonger	HGY748
Freeze Girl	XVK541
Freeze Henchman	NJL412
Joker Goon	UTF782
Joker Henchman	YUN924
Lexbot	W49CSJ
Mad Hatter	JCA283
Man-Bat	NYU942
Military Policeman	MKL382
Mime Goon	ZQA8MK
Nightwing	MVY759
Penguin Goon	NKA238
Penguin Henchman	BJH782
Penguin Minion	KJP748
Poison Ivy Goon	GTB899
Police Marksman	HKG984
Police Officer	JRY983 or V9SAGT
Riddler Goon	Q285LK
Riddler Henchman	XEU824
S.W.A.T.	HTF114
Sailor	NAV592
Scientist	JFL786
Security Guard	PLB946
The Joker (tropical)	CCB199
Two-Face Goon	95KPYJ
Yeti	NJL412
Vehicles
Bat-Tank	KNTT4B
Bruce Wayne's Private Jet	LEA664
Catwoman's Motorcycle	HPL826
Garbage Truck	DUS483
Goon Helicopter	GCH328
Harbor Helicopter	CHP735
Harley Quinn's Hammer Truck	RDT637
Harley Quinn's Motorbike	C79LVH
Mad Hatter's Glider	HS000W
Mad Hatter's Steamboat	M4DM4N
Mr. Freeze's Iceberg	ICYICE
Mr. Freeze's Kart	BCT229
Penguin Goon Submarine	BTN248
Police Bike	LJP234
Police Boat	PLC999
Police Car	KJL832
Police Helicopter	CWR732
Police Van	MAC788
Police Watercraft	VJD328
Riddler's Jet	HAHAHA
Robin's Submarine	TTF453
The Joker's Van	JUK657
Two-Face's Armored Truck	EFE933
Zoo Sweeper	DWR243
Game play
Beep Beep	ZHAXFH
Character Studs	TPJ37T
Disguises	BWQ2MS
Extra Hearts	4LGJ7T
Extra Toggle	7TXH5K
Fall Rescue	TPGPG2
Gold Brick Finder	MBXW7V
Minikit Finder	LRJAG8
Peril Finder	RYD3SJ
Red Brick Finder	5KKQ6G
Regenerate Hearts	ZXEX5D
Stud Magnet	MNZER6
Studs X2	74EZUT
Super Build	JN2J6V
Vine Grapples	JXN7FJ