[Other Question] Alternate forms showing up as Mega Evolution

[BLΛYZE]

So I've been trying to put the Galarian Zigzagoon line into a project to try out making new forms, but I've been having a problem. The Galarian Form for Zigzagoon and Linoone act like a Mega Evolution. When called into battle, they have a Mega Evo symbol on their status bar (see attached png) and after the battle, they revert back to their Hoennian Forms... What's the solution to this?

 

[HM100]

You must be using the original Essentials 17. You must use 16.2 or 17.1 onwards for this problem to disappear

 

[BLΛYZE]

Is there a possibility to update to v17.2 from an existing v17 project? I've made quite some progress on the project with the v17 version already...

 

[CharizardThree3]

So what changes you made to the scripts?
You can add them later on. The graphics and EBS don't get interrupted or anything. Just copy and paste.

 

[BLΛYZE]

I didn't make any changes to the script, actually... I thought it'd be a normal different form like the Burmys or the Unowns by default... Well, what changes do I need to make?

 

[#Not Important]

In pokemonforms.txt define as
[LINOONE-1]
blah blah blah
DONT DEFINE MEGASTONE
but copy the shellos code in the forms script

 

[BLΛYZE]

I copied Shellos' script, but it's still a Mega Evolution when I use it...