Size codes for Zelda: Ocarina of Time
(on GameCube)

Not much thus far, and it might be a while until we do get more, since the Action Replay does not have a code generator, unlike the GameShark Pro for N64. But feast your eyes upon what's been found thus far! All codes are made by Datel.

MASTER CODES (must be on for codes to work):
Ocarina of Time
KJXV-1MV6-PZMVC
UE1N-WQBP-PBJXW
3NKK-9ZQD-AFU3C
BBZN-Z5N0-GJWQV
XCD5-765Y-HKWF3
FTC9-TD6X-X7ETJ
VCFU-Q34Q-KYNK7
P7F9-00VJ-9KE0C
E550-WDWX-95ECG
E9FZ-A3QA-YCERP

Ocarina of Time: Master Quest
J03C-UMC3-F5U00
UE1N-WQBP-PBJXW
3NKK-9ZQD-AFU3C
BBZN-Z5N0-GJWQV
XCD5-765Y-HKWF3
FTC9-TD6X-X7ETJ
VCFU-Q34Q-KYNK7
P7F9-00VJ-9KE0C
E550-WDWX-95ECG
E9FZ-A3QA-YCERP

Ocarina of Time: Collector's Edition disc
8CTW-QRM1-FFTM7
8V76-PZNA-WM37U
Y60N-EFG9-B16QE
Z2K3-2XU6-D0ZYZ
XCD5-765Y-HKWF3
00A3-4QN6-DHM25
121P-8KPP-0PBV9
P6FE-G03M-QGQHF
8ANC-R5GV-855GD
B6UK-V5MU-EK7H2
5AK9-RBU9-H5YMU
DR3W-YX5Q-7XZKT
CVR7-H8B2-6TPP8
WV8X-3U73-0P4J9
ZGGE-R0VE-XEDG3
MFFV-QZ75-NQFG3

Ocarina of Time: Collector's Edition disc (PAL version)
50QY-40T2-9XZ9X
NER6-UMTG-URKQ4
2MPW-3WJ5-H4PPZ
WP1W-BV6M-4604T
XCD5-765Y-HKWF3
00A3-4QN6-DHM25
D4F8-2JXT-JG522
PJWJ-NUDZ-3N1FR
0VKU-HMNE-WNPZM
YY64-EUH7-7FCUY
P51T-T2K2-TGX04
GMFP-XB62-V796T
AD69-5235-32XZA
RD2P-HTYN-CR0NJ
MG2B-BM0X-Q3T2X
M8JR-HWPR-8EMEV
BBH8-N83N-7TJCY
EH3W-0790-PRQPG

Link
Things work a bit differently in the GameCube version. Now, you don't have to change the value to adjust Link's size. You simply do it with the press of the control pad!

Just enter one of these two codes. They are different for the original game and Master Quest:

Ocarina of Time
D-Pad Up to Grow
ZB49-YF5Z-N8ACA
69PZ-MX3M-6FRHA
CPKK-0M5J-W6QBD
5XBV-PQMR-2KA53
E5NP-Y1Z5-JF55T
E9FZ-A3QA-YCERP

D-Pad Down to Shrink
VWM4-A6EA-U9W8F
QB5Q-V3E6-RHM05
1RBD-3J1F-JAJTN
FFXU-75VQ-DDR65
6XX1-3C7F-QHUEY
E9FZ-A3QA-YCERP

Ocarina of Time: Master Quest
D-Pad Up to Grow
3W6G-WT65-GFJ0W
69PZ-MX3M-6FRHA
ZTQY-WHW2-BC9KD
25VV-JECE-9273Z
ACXC-KR89-X8UKZ
E9FZ-A3QA-YCERP

D-Pad Down to Shrink
B76F-141R-UGTA5
QB5Q-V3E6-RHM05
BYT3-74Z0-YVX02
T6VH-TJAE-Y7FG2
GHUV-YV7V-4FF0M
E9FZ-A3QA-YCERP

Ocarina of Time: Collector's Edition disc
D-Pad Up to Grow
MZ1Q-63YB-YTDD5
MNVN-XG7B-MTJ2Z
0GZH-XC7Z-1BF12
Z3ZJ-9DDV-68QR8
KQ6J-63KE-1EUTT
E9FZ-A3QA-YCERP

D-Pad Down to Shrink
W2RK-10KD-QFWFG
58YD-6M20-9D8EA
G84N-J3BN-KEFWU
Y53U-FBYX-BGP52
HJCX-BECU-7YRFQ
E9FZ-A3QA-YCERP

Ocarina of Time: Collector's Edition disc (PAL version)
D-Pad Up to Grow
RCQW-TV15-CC7MR
A81T-4YC7-Q31Z8
6DD4-HR6B-EXH6W
AQBR-204K-AUNPG
2PN8-EFRJ-PU0CZ
E9FZ-A3QA-YCERP

D-Pad Down to Shrink
22Q2-CCUZ-3N1CW
9JEN-RUNZ-FA3UF
HE47-Y7Z0-Q3ZK1
PPM0-JJ3X-BE4K6
M22T-5V86-FVQYF
E9FZ-A3QA-YCERP