This was written by @idkwhereisthisname, it is a tool that can detect whether a SWF file is compatible with Wii injects using FriishProduce.
It checks for:
ActionScript verson
the Flash version
Size issues
Usage
On your terminal, run python3 SWFChecker.py to start.
Make sure that your SWF file is in the same folder as the checker.
If a SWF was made with ActionScript 2 (or 1) and Flash version 9 (or older), it will say it can work with the Wii. If the game's stage resolution (in pixels) is larger than 700x500 pixels, it will warn about possible overlapping/clipping on the Wii.