NPCMovementScriptDex

Red/Blue:
00: No effect
01: Fly away and freeze
02: ACE (C43A)
03: Freeze
04: Execute VRAM
05: Freeze
06: ACE (A000)
07: ACE (B8F0)
08: Execute VRAM
09: Freeze
0A: Taking one step may load a freezing Glitch City/Super Glitch City
0B: Freeze
0C: Freeze
0D: #5 ERROR forever
0E: Freeze
0F: Freeze
10: Cause copies of existing tiles of the screen as artefacts when walking right
11: Freeze
12: Freeze
13: Freeze
14: Walking around may cause freezes with influence on where you are
15: ACE (CC55)
16: Like 10
17: Like 10, 16
18: Freeze
19: Freeze
1A: Freeze
1B: Like 10, 16, 17
1C: Freeze
1D: Freeze
1E: Freeze
1F: Freeze
20: Freeze
21: Reset the game
22: Freeze
23: Freeze
24: Freeze
25: Freeze
26: ACE (CD70)
27: Freeze
28: Freeze
29: Freeze
2A: Disable A text boxes (including even PCs)
2B: Execute VRAM
2C: Like 2A. Sprite artefacts may occur
2D: Disable all joypad input
2E: Execute VRAM
2F: ACE (AF0E)
30: Freeze
31: Like 21
32: Freeze
33: ACE (EAD1)
34: [[Invalid opcode]] freeze (0xE3 at D:5177)/Freeze? (VC)
35: Freeze
36: ACE (E678)
37: Freeze
38: ACE (CD0F)
39: Freeze
3A: Like 2A, 2C
3B: Freeze
3C: ACE (D1B1) [*1]
3D: Freeze
3E: ACE (C3AF)
3F: Like/see 34
40: Like 2A, 2C, 3A
41: Freeze
42: ACE (D56F) [*2]
DD: ACE (F5D5) [*n]

*1: Party Pokémon 2 Special stat experience mod 256 
*2: PC item 27
*n: In Echo RAM copy of wMissableObjectList byte 8 (can be adjusted another means for permanence)

Yellow:
15: ACE (FA86) [*1]

*1: In stored Pokémon data (Pokémon 6)