Cheats and Codes for Lemmings on NES:

Level	Fun	Tricky	Taxing	Mayhem
1			VSDGSJ	SJFHGD
2	TYRNVD	GNRXNF	HGSFDY	HDFTGS
3	GFDQRT	PQZFCG	WMQQDF	XCSFSD
4	DFGTYQ	TWWYWY	PRTTMR	SHDYWR
5	QQNBGT	ZQSDHQ	RYVCTD	KRWQHJ
6	YRBNCP	QTDFSG	ZWKRBD	PDHJDN
7	DGBFHY	ZRLYDR	FRRWNB	HPBFXX
8	CVRQKJ	GSHGSX	WYPRHD	BZGSDT
9	JSQRBS	ZGMRNZ	PDKDJJ	MLYZTF
10	FKJTYQ	CVBXSH	YPPSLG	FFDYSF
11	XVSPDX	LKJHHG	HWRWXQ	YYKSGS
12	XXXGDS	XCSDCX	DHYWKL	GLSHSL
13	HXWQPX	DFJJQZ	VWYRTN	VLKSDH
14	KXWXLW	VGSDTB	XYHGXX	GTNGQQ
15	KSQZHQ	HXHSDJ	PLWJHL	JDFSDY
16	VNWSQW	JCMVWX	GKJXCZ	WRDFVH
17	FQTYMS	VFWZQL	DDBNDL	GDHGFT
18	GZSFGM	LJDRKB	JFGSJK	WQDTGD
19	YZKBLP	CGHYQS	NSDFSY	THRRSH
20	PLSTFL	PSDHTW	BDRMLN	LJJDJJ
21	JXFCBS	CHTLNX	JSDASV	KBGVXM
22	ZSDFFG	GFTTYK	QWRTLR	SSHSJS
23	TYPQGH	BSWHXZ	QHQLJS	LZTRYD
24	QZKQXZ	KSLXSN	MRGHFW	VGXNFM
25	LQZDGV	JQTVYR	WHGXZL	ZQQPLM