[Script] [Pokered] Newly added trainers don't work, what did I do wrong?

[GamerXYZ]

In Viridian Forest I want to add Yellow's trainers to give more trainers to battle before Brock. However, while the trainers are in the proper location, they don't say what they're supposed to say and only the trainer with the 2 Caterpies battles me. I followed the following tutorial (only I figured out the part of adding a custom party myself): https://github.com/pret/pokered/wiki/How-to-Add-a-New-Trainer

As for what precisely I did:

In constants\event_constants.asm, of course under the Viridian Forest events, I continued from the existing const EVENT_BEAT_VIRIDIAN_FOREST_TRAINER_2 (so, the same line 5x with numbers 3 to 7)

In data\maps\objects\ViridianForest.asm, under object_event 27, 40, SPRITE_YOUNGSTER, STAY, NONE, 8 ; person I added the following:

Spoiler:

object_event 28, 32, SPRITE_YOUNGSTER, STAY, LEFT, 9, OPP_BUG_CATCHER, 15
object_event 28, 18, SPRITE_YOUNGSTER, STAY, LEFT, 10, OPP_BUG_CATCHER, 16
object_event 2, 17, SPRITE_YOUNGSTER, STAY, LEFT, 11, OPP_BUG_CATCHER, 17
object_event 2, 41, SPRITE_COOLTRAINER_F, STAY, NONE, 12, OPP_LASS, 19
object_event 13, 17, SPRITE_YOUNGSTER, STAY, RIGHT, 13, OPP_BUG_CATCHER, 18

In text\ViridianForest.asm at the end of the file I added the following (note: Frst is not a typo, I followed the disassembly's example which does that in all the AfterBattleText):

Spoiler:

_ViridianForestBattleText4::
text "Hey! You have"
line "#MON! Come on!"
cont "Let's battle 'em!"
done

_ViridianForestEndBattleText4::
text "No!"
line "CATERPIE can't"
cont "cut it!"
prompt

_ViridianFrstAfterBattleText4::
text "Ssh! You'll scare"
line "the bugs away!"
done

_ViridianForestBattleText5::
text "Yo! You can't jam"
line "out if you're a"
cont "#MON trainer!"
done

_ViridianForestEndBattleText5::
text "Huh?"
line "I ran out of"
cont "#MON!"
prompt

_ViridianFrstAfterBattleText5::
text "Darn! I'm going"
line "to catch some"
cont "stronger ones!"
done

_ViridianForestBattleText6::
text "Hey, wait up!"
line "What's the hurry?"
done

_ViridianForestEndBattleText6::
text "I"
line "give! You're good"
cont "at this!"
prompt

_ViridianFrstAfterBattleText6::
text "Sometimes, you"
line "can find stuff on"
cont "the ground!"

para "I'm looking for"
line "the stuff I"
cont "dropped!"
done

_ViridianForestBattleTextPikaGirl::
text "Hi, do you have a"
line "PIKACHU?"
done

_ViridianForestEndBattleTextPikaGirl::
text "Oh no,"
line "really?"
prompt

_ViridianForestAfterBattleTextPikaGirl::
text "I looked forever,"
line "but I never found"
cont "a PIKACHU here!"
done

_ViridianForestBattleTextSamurai::
text "I'm gonna be the"
line "best. You just"
cont "can't beat me!"
done

_ViridianForestEndBattleTextSamurai::
text "After"
line "all I did..."
prompt

_ViridianForestAfterBattleTextSamurai::
text "A METAPOD is cool"
line "because its"
cont "attack is its"
cont "defense!"
done

In scripts\ViridianForest.asm, first under ViridianForest_TextPointers, under dw ViridianForestText14 I added new lines going from 15 to 19. Then under ViridianForestTrainerHeaders I added the following after the 3 TrainerHeaders that are already there (but before db -1 of course):

Spoiler:

ViridianForestTrainerHeader3:
trainer EVENT_BEAT_VIRIDIAN_FOREST_TRAINER_3, 4, ViridianForestBattleText4, ViridianForestEndBattleText4, ViridianForestAfterBattleText4
ViridianForestTrainerHeader4:
trainer EVENT_BEAT_VIRIDIAN_FOREST_TRAINER_4, 4, ViridianForestBattleText5, ViridianForestEndBattleText5, ViridianForestAfterBattleText5
ViridianForestTrainerHeader5:
trainer EVENT_BEAT_VIRIDIAN_FOREST_TRAINER_5, 1, ViridianForestBattleText6, ViridianForestEndBattleText6, ViridianForestAfterBattleText6
ViridianForestTrainerHeader6:
trainer EVENT_BEAT_VIRIDIAN_FOREST_TRAINER_6, 0, ViridianForestBattleText7, ViridianForestEndBattleText7, ViridianForestAfterBattleText7
ViridianForestTrainerHeader7:
trainer EVENT_BEAT_VIRIDIAN_FOREST_TRAINER_7, 4, ViridianForestBattleText8, ViridianForestEndBattleText8, ViridianForestAfterBattleText8

And still in the same file, at the end of it I also added this:

Spoiler:

ViridianForestText15:
text_asm
ld hl, ViridianForestTrainerHeader3
call TalkToTrainer
jp TextScriptEnd

ViridianForestText16:
text_asm
ld hl, ViridianForestTrainerHeader4
call TalkToTrainer
jp TextScriptEnd

ViridianForestText17:
text_asm
ld hl, ViridianForestTrainerHeader5
call TalkToTrainer
jp TextScriptEnd

ViridianForestText18:
text_asm
ld hl, ViridianForestTrainerHeader6
call TalkToTrainer
jp TextScriptEnd

ViridianForestText19:
text_asm
ld hl, ViridianForestTrainerHeader7
call TalkToTrainer
jp TextScriptEnd

ViridianForestBattleText4:
text_far _ViridianForestBattleText4
text_end

ViridianForestEndBattleText4:
text_far _ViridianForestEndBattleText4
text_end

ViridianForestAfterBattleText4:
text_far _ViridianFrstAfterBattleText4
text_end

ViridianForestBattleText5:
text_far _ViridianForestBattleText5
text_end

ViridianForestEndBattleText5:
text_far _ViridianForestEndBattleText5
text_end

ViridianForestAfterBattleText5:
text_far _ViridianFrstAfterBattleText5
text_end

ViridianForestBattleText6:
text_far _ViridianForestBattleText6
text_end

ViridianForestEndBattleText6:
text_far _ViridianForestEndBattleText6
text_end

ViridianForestAfterBattleText6:
text_far _ViridianFrstAfterBattleText6
text_end

ViridianForestBattleText7:
text_far _ViridianForestBattleTextPikaGirl
text_end

ViridianForestEndBattleText7:
text_far _ViridianForestEndBattleTextPikaGirl
text_end

ViridianForestAfterBattleText7:
text_far _ViridianForestAfterBattleTextPikaGirl
text_end

ViridianForestBattleText8:
text_far _ViridianForestBattleTextSamurai
text_end

ViridianForestEndBattleText8:
text_far _ViridianForestEndBattleTextSamurai
text_end

ViridianForestAfterBattleText8:
text_far _ViridianForestAfterBattleTextSamurai
text_end

Finally, in data\trainers\parties.asm I added the following at the end of BugCatcherData (parties 15-18 in the BugCatcherData list) and LassData (party 19 in the LassData list) (in this comment, I separate the 2 by --- to not overflow this topic with spoiler buttons). MEW is a custom Metapod with Tackle and String Shot (I used the Mew data for that for simplicity's sake since I'm not using Mew in my hack anyway), in case anyone's wondering why that's there:

Spoiler:

; Viridian Forest Yellow
db 7, CATERPIE, CATERPIE, 0
db 6, METAPOD, CATERPIE, METAPOD, 0
db 10, CATERPIE, 0
db 8, CATERPIE, MEW, 0

---
; Viridian Forest Yellow
db 6, NIDORAN_F, NIDORAN_M, 0

EDIT: OK, I've made some progress. Apparantly in scripts/ViridianForest.asm I had to put the text poiners (15-19) between 8 and 9. Now I can battle the trainers and they say what they're supposed to say. However, only the first new trainer with the 2 lvl 7 Caterpies actually spots me with an exclamation mark: the others don't. Also, that first new trainer does so infinitely.
EDIT2: Ah, something is really wrong. The signs act as doubles for the trainers now. Clearly some pointer issue but I don't know what, the guide says nothing about position and stuff.