Where can I find LEGO X-Pod Playoff rules and printoffs?
Here are the PDFs donated by Friend Of George. Here are the unit catalog PDFs.

The starter kit for each pod has an inventory list, a set of cards containing units which can be built, and a set of X-TRA cards.  The cards and inventory list can be printed on card stock for better durability.

The Advanced Rules contain additional rules and Advanced X-TRA cards for the game.

The Advanced Strategy Guide contains some tips on how to best choose and use your units, along with movement and placement strategies.  It also gives sample sets of units and strategies for each Pod against each of the other Pods.

The boards were generated from the website with no obstacles for maximum flexibility.  Bricks should be used for these and placed where desired.