Go to the Numberman Machine in Higsby’s Shop and enter the codes to get the stuff:

35607360              Anti Elec 
 73877466	      Anti Fire 
 05068930	      Anti Navi V
 10386794	      Anti Sword R
 25465278	      Anti Water 
 10133670	      Anti Wood 
 63231870	      Attack MAX (Yellow NCP)
 79877132	      BeatSupport NCP
 30112002	      BodyPack NCP
 80246758	      BusterPack NCP
 87412146	      Charge MAX (White NCP)
 15595587	      Custom 2
 07765623	      Custom Bolt 3 G
 68799876	      Dark Invis 
 91098051	      DjangoSP D
 12118790	      Full Energy
 90914896	      Full Energy
 35321321	      Gun Del Sol 3 O
 90630807	      HP +200 (Pink NCP)
 13926561	      HP+300 (White NCP)
 03419893	      HP+400 (Pink NCP)
 45654128	      HP+400 NCP
 31084443	      HP+50 NCP
 72846472	      HP+500 (White NCP)
 29789661	      Lock Enemy
 12117890	      Mini Energy
 48958798	      Noise Storm S
 36695497	      Rapid MAX (Pink NCP)
 18746897	      Recovery-300 Y
 09609807	      Rush Support
 64892292	      Shinobi Dash
 28256341	      SoulTime +1 (Yellow NCP)
 12541883	      Spin Blue
 78987728	      Spin Green
 30356451	      Spin Red
 48958798	      Static S
 54288793	      TangoSupport NCP
 28706568	      Unlocker
 64664560	      Unlocker
 73978713	      Unlocker
 00798216	      Untrap
 
 
 

Have the Navi Customizer Program you want compressed highlighted in the Navi Customizer Screen. Then hold Right and enter any of the following codes for the NPC to

compress it (reduce its size 1 block). Inputting any of the codes a second time will decompress it:

 
 BLBABLBBAA	      Airshoes
 LLLRRBARBL	      AttackMAX
 AABRABRLLR	      BatteryMode
 ABBRAABRBR	      BeatSupport
 BARABRLRRA	      BodyPack
 BABLABRLRB	      BugStopper
 LLRARLBLAR	      BusterPack
 ALAARBRBAR	      ChargeMAX
 BRALARBAAB	      Collect
 AARLBABALB	      Custom 1
 BARLLRALBR	      Custom 2
 RRBBRBRBAA	      Dandyism
 RLABBARALR	      FirstBarrier
 ALLBRLAAAL	      FloatShoes
 RRLBLLARBL	      GigaFolder1
 BBRALBLARR	      GigaVirus
 ABLARABLRL	      HumourSense
 BABALRARAA	      I'm Fish
 LRLABLBBLA	      Jungle Land
 RBBARBRARB	      KawarimiMagic
 BBABBRRLAR	      MegaFolder 1
 AABLARBLAA	      MegaVirus
 RLRARRLLLR	      Millionare
 LBRARLABLB	      Oil Body
 RARLLRRABA	      RapidMAX
 LLRBLLAALB	      Reflect
 RBLRBRLLRL	      RushSupport
 ALRABLRALR	      SaitoBatch
 RLRLRBBRAB	      SelfRecovery
 ABARALRBBA	      Shield
 RLLALLBABB	      ShinobiDash
 RABRALLRBA	      SuperArmor
 LBLABLABAL	      TangoSupport
 ARBBRLRALA	      UnderShirt
 

Thanks to Revolution readers Jimbo Jones and Rapatack!