Here's the complete list for all Cheat Codes. They Do Not deactivate achievements.
Extras
Always Score Multiply	9LRGNB
Area Effect (Sonic suit)	TL3EKT
Armor Plating (Demolition suit)	N8JZEK
Bats (Sonic suit)	XFP4E2
Beep Beep	RAFTU8
Character Studs	DY13BD
Decoy	TQ09K3
Disguise	GEC3MD
Extra Toggle (extra Free mode characters)	EWAW7W
Extra Hearts	ML3KHP
Fast Batarangs (all suits)	JRBDCB
Fast Build	GHJ2DY
Fast Grapple (all suits)	RM4PR8
Fast Walk (Magnet suit)	ZOLM6N
Faster Pieces (Attract suit)	EVG26J
Flaming Batarangs (Heat protection suit)	D8NYWH
Freeze Batarang (Water suit)	XPN4NG
Ice Rink	KLKL4G
Immune to Freeze	JXUDY6
Invincibility	WYD5CP
Minikit Detector	ZXGH9J
More Batarang Targets	XWP645
More Detonators (Demolition suit)	TNTN6B
Piece Detector (Attract suit)	KHJ544
Power Brick Detector	MMN786
Regenerate Hearts	HJH7HJ
Score x2 Multiplier	N4NR3E
Score x4 Multiplier	CX9MAT
Score x6 Multiplier	MLVNF2
Score x8 Multiplier	WCCDB9
Score x10 Multiplier	18HW07
Silohuettes	YK4TPH
Slam (Glide suit)	BBD7BY
Sonic Pain	THTL4X
Stud Magnet	LK2DY4

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CUL Booster Enthusiast

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
The Joker's van	JUK657
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
Two-Face's armored truck	EFE933
Characters
Alfred Pennyworth	ZAQ637
Batgirl	JKR331
Bruce Wayne	BDJ327
Catwoman (classic)	M1AAWW
Clown Goon	HJK327
Commissioner Gordon	DDP967
Fishmonger	HGY748
Freeze Girl	XVK541
Freeze Henchman	NJL412
The Joker (tropical)	CCB199
Joker Goon	UTF782
Joker Henchman	YUN924
Nightwing	MVY759
Mad Hatter	JCA283
Man-Bat	NYU942
Military Policeman	MKL382
Penguin Goon	NKA238
Penguin Henchman	BJH782
Penguin Minion	KJP748
Poison Ivy Goon	GTB899
Police marksman	HKG984
Police officer	JRY983
S.W.A.T.	HTF114
Riddler Goon	CRY928
Riddler Henchman	XEU824
Sailor	NAV592
Scientist	JFL786
Security Guard	PLB946
Yeti	NJL412
Zoo Sweeper	DWR243

SOURCE: http://cheatcc.com/xbox360/legobatmancheatscodes.html

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CUL Booster Enthusiast

So you have to earn Bane the normal way, I take it?

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Resident Evil 5 1000/1000 (Not including DLC)
Waiting for Batman:Arkham Asylum

Yup. Just rescue all the citizens.

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CUL Booster Enthusiast

 Quxx wrote:

Yup. Just rescue all the citizens.

Aren't the citizens for Hush?

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Resident Evil 5 1000/1000 (Not including DLC)
Waiting for Batman:Arkham Asylum

 TehProElite wrote:

 Quxx wrote:

Yup. Just rescue all the citizens.

Aren't the citizens for Hush?

I'm pretty sure it's Bane. He's the last villain you unlock.

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CUL Booster Enthusiast

after you rescue all the citizens you unlock hush

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Bootblack fan club member

so i can put them all in and still get (most achievements)

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Playing - Anything that comes to mind.

Yes. Cheats do not disable achievements.

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CUL Booster Enthusiast