Finished making art of a concept I had for a long while.

A note is that this Pokéball was most likely created by a disguised mew when no one was looking.

As stated, the M.P.H.'s exterior colorations can be that of any existing Pokéball. a coloration that can be noticeable on the ceiling and walls of the rooms inside the M.P.H.. Though, Pokémon are allowed to repaint the inside of the M.P.H. however they like. Especially given that there's 4 personal rooms that can be changed to the Pokémon's liking.

A note is that the M.P.H.'s button doubles as the bedroom window, using one-way transparent glass, plastic, or, honestly, whatever material a Pokéball is made out of so that people can't see inside the M.P.H., but the Pokémon can see them from inside the M.P.H..

There's also an alert feature that goes off if a trainer is getting too close to an M.P.H. when a Pokémon is inside it. The time the alert happens depends on the location and speed of the Pokémon living inside the M.P.H., essentially happening soon enough that a Pokémon is able to scrabble to the control room as use the steering wheel and controls to drive the M.P.H. away from the trainer using the disguised wheels that are on both sides of the M.P.H..