Why is the legality checker in PKHeX only for Gen 6?

[JohnTravolski]

I understand that it could be more challenging to make, but why is there no legality checker implemented for Pokémon that came from previous generations ("Origin Game" in PKHeX set to anything other than XY/ORAS)? Is a feature like this a work in progress or should I never expect it at all?

Also, I noticed that the latest version of PKHeX includes a database of (I think all) of the Gen 6 events, which is absolutely fantastic. However, will event Pokémon given out in previous generations ever be added to the database (for example, Shiny Winter Raikou with Extreme Speed, Weather Ball, Aura Sphere, and Zap Cannon)?

[Kaphotics]

could be more challenging to make

^

PKHeX is open source, anyone can contribute code. Most people are concerned about checking battle spot legality for gen6 mons, anyway.

There's only so much time in the day, so certain features are prioritized and others not. Getting all games compatible before S/M was accomplished, now it's just fine tuning prior to S/M demo.

[JohnTravolski]

I see. Well, good luck! Thanks for all the hard work!