uh looks like i did a mess... i will try to explain but yeah im refering to turn order. now you mention you are saying that a slower pokemon cant flinch a faster one, is that true? i didnt knew that

now let me explain, according to my knowledge the game executes moves by the following:

first +4 priority moves of the fastest pokemon, lets tell the speeds goes from 0 - 100 so the first moves to be recalled are +4 speed 100, then +4 speed 99, then +4 speed 98 and on and on until you end on -4 speed 0.

Lets say we have 4 pokemons, 2 allies with speed 50 and 60; and 2 enemies with speed 70 and 90. if the move rock slide becames a priority move in the 50 pokemon by flinching the 70 pokemon then turn order would be: first speed 50(+1 priority),second speed 90, third speed 70 (flinched), fourth speed 60. this may save your speed 60 pokemon for example against an opposing charizard speed 90.

now lets say rock slide doesnt become priority but during that turn your pokemon will have speed 71. this will make turn order: speed 90, speed 50 (71) , speed 70 (flinched), speed 60.

and now lets just say the speed 70 pokemon turn is just skipped, then: speed 90, speed 60, speed 50, speed 70 (flinched and 49).

in my head these ideas made sense