Please, I need to know according to my team what is a good pokemon for Zoroark to illusionize
Zoroark's ability is situational. You want to bring him out disguised as something that's going to force your opponent out. There isn't one specific pokemon that he should "copy"... That's the point of his ability to catch your opponent off guard.
For example; say your opponent has a dragon out (say Garchomp) you'd try and disguise it as a Starmie or something similar to scare them into switching Garchomp out in fear of the impending Ice Beam but on that switch you nasty plot and then Proceed to sweep what you can.
Now obviously that's a little harder to do then just saying. But that's the point of his ability.
TL;DR, There isn't a perfect pokemon for Zoroark to disguise itself as.