Well, I guess Gamefreak addressed the question of why in previous gens the player character can nearly open any door they come across, even houses they don't even live in or own.
It seems that Z-Moves' power is based upon the move you use to activate them. Thunderbolt creates a 175 BP move, and Nuzzle creates a 100 BP move. They also become Physical or special depending on the move you use. This also means you most likely won't be able to activate Z-Moves off of non-attacking moves. Who's ready for +200 BP Dragon Z-moves off of Draco Meteor? What about basing a Z-Move off of Explosion's power? Whooof.
We already have moves like this, Wake Up Slap and Smelling Salts. Both those moves do double damage to the target if afflicted by said stat, so the stategy here seems to be Scald + Aria.
Also people running Flame Orb and Guts, not a common strategy but it would run into problems with Primarina especially if Primarina's faster than the Guts Pokemon.
Cuz he ugly as Hell and I didn't want this aesthetic on a Fire/cat.
IF this was catered to Genwunners it'd be a remake of a Remake of Pokemon Red/Blue.