(Request) The Legend of Zelda: Wind Waker - higher difficulty

[Paar86]

Hello everyone. Is it possible to make a code which would halve the damage done by Link (or raises hit points of his enemies)? The game is too easy for my taste so I want to make it harder. I found these two codes, so maybe they will come handy (are those AR codes?). Both should be for NTSC version:

Link Takes Double Damage (donny2112) - from Wind Waker
2ZE2-9RFQ-19Y6U
81T2-W09H-35FH2
2FQK-3B4U-2KNX5
EMF5-HNNF-UHTTR
6X52-QE2G-E613M
YKP2-HQE9-3A9AH
EWQQ-5UXG-0MRR0
XXMJ-VB7J-3202C

Enemy Health x2 (brkirch) - this is from Twilight Princess (works for GC version too)
7ZGE-YYFC-WW31E
77U0-CN6D-8083D
AYZ3-JBPB-KFK24
2PXQ-R68N-QAW9P
32U3-1EZC-JB8WH
QXHQ-R36K-8GH8F
M0TW-7YXY-4YBT0
DTTQ-3Y30-6X6DC
ACJT-JCWM-GBDRG
2MHG-J1P6-NPMBK
TDRK-QE3R-RRAXX
AX8R-UHY6-4XCCE

Thanks!