I went extreme and activate those codes one a time and talk to the tomb stone:
[Spiritomb Encounter talked to 00 people online]
02100000 50B11EF8 00000000
[Spiritomb Encounter talked to 01 people online]
02100000 50B11EF8 00000001
[Spiritomb Encounter talked to 02 people online]
02100000 50B11EF8 00000002
[Spiritomb Encounter talked to 03 people online]
02100000 50B11EF8 00000003
[Spiritomb Encounter talked to 04 people online]
02100000 50B11EF8 00000004
[Spiritomb Encounter talked to 05 people online]
02100000 50B11EF8 00000005
[Spiritomb Encounter talked to 06 people online]
02100000 50B11EF8 00000006
[Spiritomb Encounter talked to 07 people online]
02100000 50B11EF8 00000007
[Spiritomb Encounter talked to 08 people online]
02100000 50B11EF8 00000008
[Spiritomb Encounter talked to 09 people online]
02100000 50B11EF8 00000009
[Spiritomb Encounter talked to 10 people online]
02100000 50B11EF8 0000000A
[Spiritomb Encounter talked to 11 people online]
02100000 50B11EF8 0000000B
[Spiritomb Encounter talked to 12 people online]
02100000 50B11EF8 0000000C
[Spiritomb Encounter talked to 13 people online]
02100000 50B11EF8 0000000D
[Spiritomb Encounter talked to 14 people online]
02100000 50B11EF8 0000000E
[Spiritomb Encounter talked to 15 people online]
02100000 50B11EF8 0000000F
[Spiritomb Encounter talked to 16 people online]
02100000 50B11EF8 00000010
[Spiritomb Encounter talked to 17 people online]
02100000 50B11EF8 00000011
[Spiritomb Encounter talked to 18 people online]
02100000 50B11EF8 00000012
[Spiritomb Encounter talked to 19 people online]
02100000 50B11EF8 00000013
[Spiritomb Encounter talked to 20 people online]
02100000 50B11EF8 00000014
[Spiritomb Encounter talked to 21 people online]
02100000 50B11EF8 00000015
[Spiritomb Encounter talked to 22 people online]
02100000 50B11EF8 00000016
[Spiritomb Encounter talked to 23 people online]
02100000 50B11EF8 00000017
[Spiritomb Encounter talked to 24 people online]
02100000 50B11EF8 00000018
[Spiritomb Encounter talked to 25 people online]
02100000 50B11EF8 00000019
[Spiritomb Encounter talked to 26people online]
02100000 50B11EF8 0000001A
[Spiritomb Encounter talked to 27 people online]
02100000 50B11EF8 0000001B
[Spiritomb Encounter talked to 28 people online]
02100000 50B11EF8 0000001C
[Spiritomb Encounter talked to 29 people online]
02100000 50B11EF8 0000001D
[Spiritomb Encounter talked to 30 people online]
02100000 50B11EF8 0000001E
[Spiritomb Encounter talked to 31 people online]
02100000 50B11EF8 0000001F
[Spiritomb Encounter talked to 32 people online]
02100000 50B11EF8 00000020
[Spiritomb Encounter talked to 33 people online]
02100000 50B11EF8 00000021
And the text didn't change once, and there is still 0 in block 31A13425 after saving with that code activated, so lets just wait for PKXeX to add a event flag or something, thanks for all your interest, good day