Use APKPure App
Get VS Flowey but FNF CharacteTest old version APK for Android
In this App, you can test some VS Flowey mod's Character
In this application, you can use FNF mod VS Flowey's Character
And they do it in the form of the FNF Character Test
in this app you can test Sans,flower etc.
I believe this game has nothing to do with Undertale,Otherwise Sans will hit me XD