Change shape is also a spell so I’m not willing to add in that level of confusion in the code. You’ll have to just make a copy of those particular NPCs and edit that keyword in them. I’d also make sure that really is wildshape rules and not one of the other shapechanger/shapeshifter rules I supply. You can read up in these posts or in txt file on page one of what keywords I support and where they go in a PC or NPC sheet.
Specifically from .txt file on page one:
Polymorph Spell - This is an NPC/PC spell name. This will support the full RAW 5E rules for this spell in the newly created sheet after the spell takes effect. Labels in the sheet will inform you that this new sheet is the one you use. If you go over to the original sheet (PC) or reference sheet (NPC) the label will be different and tell you DO NOT USE that sheet. The list of NPCs will be limited where it can be based on the RAW 5E rules. This is a targeted spell. If the target is of the same faction as the caster then it will not require the saving throw to take effect. Otherwise, it will.
True Polymorph Spell - This is an NPC/PC spell name. This will support the full RAW 5E rules for this spell in the newly created sheet after the spell takes effect. Labels in the sheet will inform you that this new sheet is the one you use. If you go over to the original sheet (PC) or reference sheet (NPC) the label will be different and tell you DO NOT USE that sheet. The list of NPCs will be limited where it can be based on the RAW 5E rules. This is a targeted spell. If the target is of the same faction as the caster then it will not require the saving throw to take effect. Otherwise, it will. This supports special custom NPC types of "object" or "item". If you make a custom NPC that has a type of one of these it will be treated as an object by this and that other spells in polymorphism (won't be considered a creature). For example, making a chair NPC with whatever structural HP it would have or anything else with a chair token and a type of "object" or "item" would be respected as an object in this spell.
Animal Shapes Spell - This is an NPC/PC spell name. This will support the full RAW 5E rules for this spell in the newly created sheet after the spell takes effect. Labels in the sheet will inform you that this new sheet is the one you use. If you go over to the original sheet (PC) or reference sheet (NPC) the label will be different and tell you DO NOT USE that sheet. The list of NPCs will be limited where it can be based on the RAW 5E rules. This is a targeted spell. If the target is self or not of the same faction as the caster that target will be ignored. A special feature that supports the ability to change shapes while a current animal shapes spell concentration is in effect requires that the target list be an exact subset of the current Animal Shapes concentration effects in play. If it is, then only that subset will change without breaking the concentration and losing the others in that active spell. Otherwise, any deviation from the target subset will result in breaking the concentration of the others (reverting them back) and casting this new target list as a new animal shapes spell transformation.
Shapechange Spell - This is an NPC/PC spell name. This will support the almost the full RAW 5E rules for this spell in the newly created sheet after the spell takes effect. Because of the nature of this spell and that you can still use your character features and spells at DM's discretion based on shape you took - this new sheet will have everything you need according to RAW 5E rules except those DM discretion things. When you go back to the original sheet it will also have a different label stating this sheet is for LIMTTED use at DM's discretion (unlike other reference sheets which state DO NOT USE). This is a self only spell and the special case allowing you to change shape while active is handled by going back to your source sheet where the NPC selection in this case will allow you to select a new NPC and hit the active button again (even though its highlighted already). If the NPC selection was different than the current one it will delete the Shapechange effect (reverting you back) and then transform you into the new NPC shape.
Shapechanger - This is an NPC trait/ PC feature which I've left completely up to the DM on what NPC's it can turn into. There are no changes to the resulting sheet - this is simply going to turn them into the pure NPC. If you want special conditions for this (like a vampire turning into mist) you make your own custom NPC. Or in some cases the shape changed attack/damage features are already on the NPC sheet and you can do nothing at all and don't even trigger polyrmorphism. This will pass in the HP data to the NPC and is really only valid to use if you copy the NPC into different versions where you add different tokens and keep all the stats etc. the same (optionally editing out attacks to the relevant ones for that token shape). Also if you die in changed shape you revert and are still dead.
Shapeshifter - This is an NPC trait/ PC feature which I've left completely up to the DM on what NPC's it can turn into. There are no changes to the resulting sheet - this is simply going to turn them into the pure NPC. It will follow most polymorph spell rules on death where it will carry over the exceeded HP when it reverts back to its shape. Used more for allowing the DM to have unrestricted polymorph (some homebrew NPC/PC have this death revert behavior).
Wild Shape - This is an NPC trait/ PC feature. This will support the full RAW 5E rules for this in the newly created sheet after the wild shape takes effect. This is a self only thing so simply supports the active button switching back and forth.

