At what part of the menu do you go to? And how do you input the cheat? Thanks so much

Item Search :
ACTION REPLAY ULTIMATE CHEATS POKEMON FOR DSI DSLITE DS
ACTION REPLAY ULTIMATE CHEATS ...
14.95
Suzanne Somers
Suzanne Somers' Eat, Cheat, an...
11.23
52 Ways to Cheat at Poker
52 Ways to Cheat at Poker
9.88
GameShark 4.0 Game Cheat for PlayStation
GameShark 4.0 Game Cheat for P...
12.99