Ecco the Dolphin

[final kaoss]

1 AKRT-JA64 Almost infinite breath„switch
off to die if you get stuck

2 AL2A-JA7L Protection from most jellyfish and
many other enemies
3 ALZA-JA5Y Protection from spiked shells
and some other enemies
4 AAVT-NAFC Protection from octopus
5 HAVT-NAFC Octopus is fatal
6 HCBT-LAEW Charging a school of fish restores
health completely instead of partially
7 SW2A-KGPJ + HC2A-JAFL Most jellyfish and some other
enemies restore health instead
of taking it away
8 SW2A-KGPJ + TC2A-JGFL + Most jellyfish and some other
E42A-JAFN enemies restore breath instead
of damaging health

[Avro Arrow]

After trying to get it for over an hour (with a lot of trial and error), I have finally pinpointed the code that makes you invincible (stars all around you)

The Code is...

FFB7CC:0001

Enjoy!