You can get to the Debug Menu from anywhere in the game. To activate it press [START] to pause the game while Ecco turns from one side to the opposite. He should be looking at you now. Then press the following buttons: [RIGHT], [B], [C], [B], [C], [DOWN], [C], [UP]. You will be in a menu where you can select any level, get Invincibility, play music and a lot more!
Passwords for the Genesis version differ from the ones for the SegaCD version! To get those scroll down a bit.
Table uses following format:
Stage: Password
Undercaves: OZNAINCX
The Vents: TQDPXJDK
The Lagoon: WVEVWSHL
Ridge Water: WGMABVNX
Open Ocean: IWRLBVNP
Ice Zone: MVUAEVNN
Hard Water: HJAJRQLR
Cold Water: HBMFRQLR
Island Zone: DEUIOQLY
Deep Water: ZEGQLFBQ
The Marble Sea: CRGUQQLK
The Library: PWAYQQLA
Deep City: VDPQQQLU
City of Forever: EYFTXRES
Jurassic Beach: ZHEIRCBM
Pteranodon Pond: SPXWAPET
Origin Beach: AOSABPEA
Trilobite Circle: HRXLRCBA
Dark Water: LFIJBPEB
Deep Water 2: MFXAKNLW
City of Forever 2: MFCRWCIQ
The Tube: WKBFKMLT
Welcome to the Machine: BMUMCNLT
The last Fight: MXFNOQKP
Passwords for the SegaCD version differ from the ones for the Genesis version! To get those scroll up a bit.
Table uses following format:
Stage: Password
Undercaves: GMRIQDCM
The Vents: IUEINLDP
The Lagoon: GRTJZYJF
Ridge Water: OVDJDSLB
Open Ocean: GMYMDSLI
Ice Zone: GMBRHSLU
Hard Water: UKZFHSLS
Cold Water: SYQJHSLZ
Open Ocean 2: CCVFFSLM
Island Zone: ALZBESLS
Deep Water: IHPFDSLP
Volcanic Reef: ADLYESLT
Ship Grave Sea: NWUGSLU
Wreck Trap: WJHQGSLL
Sea of Silence: IZSXGSLF
Deep Gate: AKNBHSLI
The Marble Sea: QSOMFSLQ
The Library: WBTXFSLV
Deep City: UNIQFSLN
City of Forever: WADUFSLB
Jurassic Beach: ONNBJPLY
Pteranodon Pond: WPVXIPLL
Origin Beach: AQZIJPLG
Trilobite Circle: GKGFJPLK
Dark Water: GZIUKPLR
Deep Water 2: GAAGDPLP
City of Forever 2: YLQQZNLM
The Tube: MNEYELLB
Welcome to the Machine: SKZNELLO
The last Fight: KANZFLLX