The Engine doesn't import .mcaddon files. The connection happens when it locates the BP and RP folders.
Open PocketMon Engine.
Wait for the scan on the start screen.
Select the project containing the Pocketmon BP and RP.
Wait for the Dashboard to load.
The detector looks for packs in development_behavior_packs and development_resource_packs. It reads the manifests and tries to pair the BP and RP by UUID dependencies.
On Windows, the common path is:
%LOCALAPPDATA%\Packages\Microsoft.MinecraftUWP_8wekyb3d8bbwe\LocalState\games\com.mojang\
The relevant folders are:
development_behavior_packs\
development_resource_packs\
The path can vary between Minecraft Bedrock, Preview, Launcher, and Microsoft Store. Check or adjust it in Settings.
Use this when the addon is outside com.mojang, was extracted from a .mcaddon, or doesn't show up in the scan.
Click Select folders manually.
Choose the Behavior Pack root.
Choose the Resource Pack root.
Confirm the loaded project.
Example:
D:\Projetos\PocketMon\behavior_pack\manifest.json
D:\Projetos\PocketMon\resource_pack\manifest.json
The BP and RP must belong to the same addon. For Pocketmon, the expected namespace is df_pk and the main entity is df_pk:pokemon.