Aquagear

The Aquagear is a blue device that lets trainers communicate with Water Type Pokemon. Max revieved this from Prof. Maple in contrast to Parker receiving the Pyrogear.

Max
Max recieved this as a gift from Professor Maple prior to him capturing Ness. He used it in order to talk to Ness and his ohter Water type Pokemon.

Zack
Zack claims he owns one