wacrone wrote:the teacher has not shown up in mine for at the bathroom after potion shrinkage
First, you have to get captured by Rita, the one who shrinks you. At one point, she sticks you in her cleavage, where you have to escape. Turns out you were in class! The teacher isn't happy about the distraction. After that, get shrunk by Rita, and the teacher shows up in the first door of the back row of toilets. If she doesn't show up, just keep going out and back in, it's RNG based. It's actually not complete, yet, though, so even though you can interact with her and do all the stuff, there is no way to lose, the battle just keeps going in perpetuity. The only way to stop that is either escaping or closing the game.