For Mew in the pokedex.....
1.enter 91B679d1(its missingno. code but if u want mew than DO IT!)
2.hit shellder 6 times
3.hit..
To get the ballsaver always on type in the code
0D2049ED
0D20BDED
OD202CED
0D20A1ED
You'll never lose a game!
Some random codes
Pinball Gameshark Codes
91059DD4 Infinite Balls
91607AD5 Infinite Time (note 1)
9160A4D4 Infinite Ball Saver and Pikachu Savers
91XX79D5 E..