Bubble machine

A Bubble Machine is an object in Dr. Mario World. Introduced in World 13, the bubble machine will turn on if objects next to it are eliminated. If the player does it again, the fan will encase a random virus in a bubble. It can also affect some items (shells, exploders, skill chargers, pop cannons, or electric exploders). Dr. Morton's skill can change them into empty blocks, causing the machine to be deactivated until the player returns to that stage. If a capsule match is made next to a bubble machine, the skill meter will be filled by one extra point for each bubble machine in contact with the match.

In-game description

 * "If you eliminate pieces next to the bubble machine, it will turn on. Do it again, and it'll hide a random virus in a bubble!"