Fast Growth mode on Gyaoppi 2

Hello everyone, yes I need some help with Gyaoppi 2 again... While it was in my pocket, looks like my Gyaoppi 2 entered fast growth mode by accident (where minutes pass by like seconds) Does anyone know how to stop it? I was forced to stop the time or he would die, I couldnt keep up... I tried what it says on tamenagerie, but none of it works. If anyone has instructions for any similar Gyaoppis, to see if I can find info there, I would greatly appreciate it.