The following are known Action Replay Codes for Olympic Hockey 98 on Nintendo 64 (N64).

Device Compatibility: Action Replay & GameShark

Crunched Players
811157803f00

Tall Thin Players
811157803fc0

Team 1 Score 0
81111c700000

Team 1 Scores 50
81111c700032

Team 2 Score 0
811151f80000

Team 2 Scores 50
811151f80032

Big Heads
811157783fc0

Constant Fighting
8009bb5e0020

Giant Players
8111577c3fc0

Tiny Heads
811157783f00

Tiny Players
8111577c3f00