lol congrats. Does Pokemons level scale according to battle? Or only higher level Pokemons than cap are scaled down?

If you're not that far into the game, you can use the gts. I often get ditto when I offer Tyrunt
I see, Thanks. Going to accept battle the if it scale up

im playing during work 

as a reminder for you all bout legendary:

Xerneas & Yveltal its shiny locked, that mean you cant SR for shiny,
it wont died so dont care bout it.
kill it if you wanna do it, it wont die until you catch it.

quick ball (1~2 time should caught it) do the trick,
save your ball for wandering legendary,

Here are maximum possible stats for a Modest Xerneas:

HP - 201
Attack - 135
Defense - 115
Special Attack - 166
Special Defense - 118
Speed - 119

it got confirm has 3 31 max iv

how to check with modest xerneas:
during boss fight check it, if he got 163~166 SPA stats on it is modest,
If timid is 133~135 SPD

bring gardevior with synchronize ability could get 7.5% modest xerneas with best iv

only thing you cant check is nature

Pokemon>select pokemon>summary