Flipper (Stack-Up)

Flippers are one of the two "Bugs" that appear in Bingo mode of Stack-Up.

Appearance
Flippers are purple spring-like bugs that consist of two feet, three rings, a backbone, two red eyes, and two antennae. When they jump to another button, they compact and then spin while they are in the air.

Function
These enemies will only appear one at a time. Once the current one jumps off-screen, another spawns somewhere else. These enemies jump across all of the buttons in a row or column in order to make the R.O.B. move in a way that the player doesn't intend, possibly messing up the player's work. The only way to stop this is to de-activate one of the buttons they they activate, preventing it from causing that action.

Trivia

 * These enemies only appear in Stack-Up, and haven't made any major appearance since then, much like Spike.
 * These enemies only appear in single player mode, likely because it would be too hectic to move blocks with both another player and a Flipper taking control of R.O.B. at the same time.