To get one of the following items, go to Higsby's shop and find the machine next to the chip trader. There you should type any of these codes (they may be entered once):
13926561 HP+300 (White NCP)
03419893 HP+400 (Pink NCP)
45654128 HP+400 NCP
31084443 HP+50 NCP
12118790 Full Energy
90914896 Full Energy
10386794 Anti Sword R
25465278 Anti Water
10133670 Anti Wood
63231870 Attack MAX (Yellow NCP)
73877466 Anti Fire
44213168 Anti Heal P
05068930 Anti Navi
15595587 Custom 2
07765623 Custom Bolt 3 G
68799876 Dark Invis
52052687 Death Match 3 V
91098051 DjangoSP D
35321321 Gun Del Sol 3 O
79877132 BeatSupport NCP
30112002 Body Pack
50364410 Bug Fix
80246758 BusterPack NCP
87412146 Charge MAX (White NCP)
35607360 Anti Elec
90630807 HP +200 (Pink NCP)
09609807 RushSupport NCP
68942679 Steal Revenge P
54288793 TangoSupport NCP
64664560 Unlocker
00798216 Untrap
64892292 Sneakrun Subchip
28256341 SoulTime +1 (Yellow NCP)
36695497 SpeedMAX
12541883 Spin Blue
78987728 Spin Green
30356451 Spin Red
48958798 Static S
48785625 HP+300 (Pink) NCP
50906652 HP+500 (Pink) NCP
72846472 HP+500 (White NCP)
29789661 Lock Enemy
97513648 Mega Folder 2 NCP
83143652 Quick Gauge
36695497 Rapid MAX (Pink NCP)
18746897 Recovery-300 Y