TuckerZombies: Deep S**tEdit
The teleporter on Deep S**t takes you to a pipe cloged with a mssive poop pile. If you get the shovel from the Mystery Box you can bring it here and un-clog the drain, letting out hundreds of little poop peices that will attack Zombies for you. They're weak, but they come in numbers and respawn instantly.
In Suburbs, go to the corner of the map (far left on the side with one house) and unlock the gate enter the courtyard. Then use another key to unlock the house. In here you'll find three granades and a crowbar, take the crowbar to the manhole and it'll reveal a hole beneath it. This hole will lead to the Mystery Box room.
TuckerZombies: SanctumEditIn Sanctum once you turn on the power you'll be able to use the teleporters. There a three teleporters, and each on will take you to the same room, but in different places. In this room you'll be behind a white gate with a white key in front of you. Open the gate and enter the return portal. Go through all the teleporters and open all the gates to enter the Pack-A-Punch room. You can now upgrade your allies.