Wallets:
Collect the wallet in the garbage in Eddy's office. Exit the building and collect the wallet on the sidewalk. Re-enter the building and collect another wallet from the garbage. Repeat this process to collect up to nine wallets.

Level passwords (cartridge version):

Status	Password
Dynamite plunger	Z00Z00Z0-0Z00Z0-0Z0Z00Z0
Dynamite plunger and 8 whistles	ZOOZOOZO-OZOOZO-OZOZOOZO
Most items	LLHHHHHH-ODHHOH-HHHHHHGZ
All items except hole	LLHHHHHH-DHH3HH-HHHHHHD9
All items except dynamite	LLHHHHHH-HHHHHH-HHHHHH3B

Level	Password
2	SZWS
3	ZS2S
4	ZZPS
5	SW3S
6	SXES
7	ZW4S
8	ZX9S
9	WSRS
10	WZFS
11	XSJS
12	XZKS
13	WWMS
14	WXCS
15	XWAS
16	XXOS
17	S2SZ
18	STWZ
19	Z22Z
20	ZTPZ