Originally Posted by Fat MikeDecIsHere
If we're going to do this, there should be something with Shiny Pokemon as well. For example, a non-Shiny Raikou in cartridge cannot be suspected of having Aura Sphere, since the Raikou released with Aura Sphere is strictly Shiny. This goes for E-Speed Entei as well. Not sure if there are any other notable Pokemon in the game that follow this.
On top of that, shiny legendary beasts can only have their special moves (and consequently the nature locks) when they're in a Cherish Ball. A shiny legendary beast in a non-Cherish ball can have any nature, but not the special moves.
The genies and the beasts are by far the two biggest deals in this situation.
Jirachi technically applies but isn't as important - Poke Ball Jirachi can have 3rd gen tutors like Body Slam, etc., while Cherish Ball Jirachi can have Draco Meteor (lol) but no Body Slam. Even less significant is Celebi (since everyone uses Cherish Ball Nasty Plot and no one uses 3rd gen tutor moves on it)
I thought Darkrai and Arceus would apply with their special moves (the dragon moves, and Shadow Force for Arceus) as well, but those events can do everything any event without the special moves can.
At some point, for the sake of thoroughness I'll look through all the godforsaken Pikachu events for ball inconsistencies too...