Difference between RNG and Pokecheck?

Question

I heard that in one of them that you cant trade the Pokemon to anyone.
Which one can my friend do so the Pokemon is able to trade?

Answer 1

RNG is used to obtain shiny Pokemon/pokemon with perfect IVs and such. And Pokecheck is used to checks Pokemon's stats.

Source RNG: http://bulbapedia.bulbagarden.net/wiki/Pseudorandom_number_generation_in_Pokémon
Source Pokecheck: https://www.pokecheck.org/

And for trading you would have to use RNG and not Pokecheck because Pokecheck just checks the stats.

Hope I helped!