I was debating of playing Zorua for my pokemon. His ability is illusion, so wanted to ask if I can use it as a rp element and not in any battles? 
Or would it better to completely ignore him having that ability? 

I can work with both ways.

Was playing with the idea of him not getting caught for now because trainees who encouraged him were thinking he was a level one caterpie or pidgey and didnt brother to fight him at all. So he could easily run away. Well minus the trainer in the rp who caught him.

I can adapt that into him being good in hiding away from trainers. 

.

And for gijinka appearance I was thinking he used illusion to look like another just human kid. 

I can replace that with he is good at disguising. Add that he stole some clothing to help him with that.

Wanted to know what is better for this rp?