The following are known Action Replay Codes for Yu-Gi-Oh! GX: Spirit Caller on Nintendo DS (NDS).

Game ID: AYXE-9A4DC3E2

Master Code – Must Be On
03808074 ebafd7e2

Infinite DP
021058cc 000f423f

Infinite HP
122cf08c 00001f40
122d1a3c 00001f40

Quick School Level Up
021058c0 0000ffff

1 Hit Defeats Enemy
822cf8f4 00000001
122cf8f4 00000001
822d1a40 00000001
122d1a40 00000001

Instantly Win Duel
122cf8f4 00000000
122d1a40 00000000