Infinite Energy Player 1:
 D008B974 0100
 801F0604 03E8

Press select button to maximise energy bar.

Infinite Energy Player 2:
 D008B974 0100
 801F0B64 03E8

Have All 48 Characters:
 50003004 0000
 80063596 0001

Have All 15 Secret Rings:
 50001504 0000
 80063660 0001

Mode Modifier Code

NORMAL:
 800634A0 0000

BIG HEAD:
 800634A0 0001

BIG HANDS:
 800634A0 0002

BIG HEAD & HANDS:
 800634A0 0003

BIG FEET:
 800634A0 0004

BIG HEAD & FEET:
 800634A0 0005

BIG HANDS & FEET:
 800634A0 0006

BIG HEAD, HANDS & FEET:
 800634A0 0007

HUGE HEAD:
 800634A0 0008

SUPER HUGE HEAD:
 800634A0 0009

SUPER HUGE HEAD & BIG HANDS:
 800634A0 000A

SUPER HUGE HEAD & BIGGER HANDS:
 800634A0 000B

SUPER HUGE HEAD & BIG FEET:
 800634A0 000C

SUPER HUGE HEAD & BIGGER FEET:
 800634A0 000D

GROWING HEAD:
 800634A0 0010

GROWING HEAD & BIG HANDS:
 800634A0 0011