Clay Fighter 2: Judgement Clay

4D08-E4A1       Select more speed in options
DB0B-E4D1       Select more difficulty in options
8F59-EDA7       Both players jump off the screen
CB51-7D64 + 6251-7F04 + 4651-7F64 + F651-7FA4   Infinite energy and infinite time

The Blob

EE0C-77E9       Blob spit kills
EE0E-7479       Buzz saw kills
EE09-5789       Rocket-anvil attack kills

Hoppy

EEB0-5D7C       Spinning carrot kills
EEBB-5F8C       Spin kick towards(special move) kills

Octo

EE1C-5785       Brutal cartwheel kills (when close)
EE15-8DE5       Ground spin kills