Does anyone know where to find the Houndoominite? I have defeated the champion already but haven’t done anything in the post game because I first wanted to find the houndoominite. Can anyone help me?

It is not currently available it will be present in event

I doubt that. I’m guessing there are no more mystery gift events and I know for certain that it’s just bugged because the devs have stated that they want future players to be able to get everything without online or events.