A new rule was created.
To make animating easier, builders should create a "rig" for their models. This means placing invisible parts at the points where limbs move.
For example, look at a standard Robloxian. The rotate point for a Robloxian's arm is at the top half. If a "rig" was needed for the Robloxian, you would place a part at that exact location of where it rotates.
Doing this will greatly reduce the time to add a Pokemon. This rule is optional, but strongly recommended for faster production of the game.