Thank you Maruno, I'll test it, it's like I had cool stuf on the intro, but only that issue was the only obstacle.
So, in addition, there's no a wait command, right? I also wanted a comand like that on the PokeCOMP, I mean, my version of the pokegear. I wanted to put that wait command in order to allow the player to see the buttons on the pokegear chaging their sprites to a... "pressed" state while pressing C key, lift the C key and wait a little, then change the button to normal state after some frames, and then change the screen. It is the only detail i'm missing on my Pokegear. I was thinking on a method wich indicates:
if the C key is pressed{change x buton to y button}
else {the y button returns to be x button}
(obviously, this condition is for every button)
But the problem was at the time of changing the screens, if C key is not being pressed, the y button returns to x button... but it was supposed to take the player to x screen if the C key was pressed, the problem is: there's no method for that, so... I had to put only an else... but is the C key is not pressed, it will create a crash because EVERY screens would try to appear at the same time.
Did you get me? Hahaha, I'm not so good writing in english.