The following are known Action Replay Codes for Yu-Gi-Oh! World Championship 2007 on Nintendo DS (NDS).
Game ID: AY7E-12AB4257
Max / Infinite DP
02110360 05f5e0ff
Press START to Restore HP
9210ff08 00000008
022ed570 0000270f
022f06b0 0000270f
d2000000 00000000
Press SELECT for Instant Win
9210ff08 00000004
022ed574 00000000
022f0f18 00000000
d2000000 00000000
Game ID: AY7E-12AB4257
Max / Infinite DP
02110360 05f5e0ff
Press START to Restore HP
9210ff08 00000008
022ed570 0000270f
022f06b0 0000270f
d2000000 00000000
Press SELECT for Instant Win
9210ff08 00000004
022ed574 00000000
022f0f18 00000000
d2000000 00000000