Here’s a thought: a source of magic to add a sort of Pokemon flair into your campaigns. Invent spells that can warp monsters so that they can enter and exit small enclosures (locket pendant, small potion bottle, etc.) without injury. Nice, interesting way to bring pets and familiars into the battlefield, or an unfortunate trap as the lowly thief opens a necklace’s locket and unleashes the fury of its monstrous protector.