PAC-MAN MUSEUM+

When in your arcade, press then select 'Customize' then select a square. Use / to select the 'Decoration' tab to choose a Change Machine. You'll need to place all 3 different Change Machines in to your arcade at the same time and exit the menus back to your arcade to get the achievement to pop (there is a slight delay before it does).

Here are the 3 Change Machines, the game they're awarded from and how to get them: -

Orange change machine - Pac-Attack - Eat 200 ghosts (accumulative across all games)

Gray change machine - Pac-Man Arrangement - Clear 20 stages (doesn't have to be in 1 game)

Blue change machine - Given to you at beginning of the game and will already be in your arcade unless you removed it.