|Game(s)||Newer Super Mario Bros. Wii|
Newer SMBWii Plus
Newer Super Mario Bros. DS
Newer: Summer Sun
|First appearance||(Wii) Asteroid Belt|
(DS) Highhop Pass
|Final appearance||(Wii) Bowser's Keep (Bowser)|
(DS) Bowser's Castle
They are mainly found within space-themed levels, often in groups, although they do appear during Bowser's boss fight in Newer Super Mario Bros. Wii and have a whole section in Bowser's Castle from Newer Super Mario Bros. DS.
Amps are black metallic balls with two purely yellow eyes half-hidden by their white-lipped smiling mouths, showing a red tongue inside. Yellow electricity surrounds them at almost all times. Their idle animation shows them constantly spinning.
Amps act more-so as tools than enemies. They will float, stationary, hurting the player on touch. They are often used as a way of guiding the player where and where not to go.
Amps are completely immune to Fire Flowers' fireballs and Hammer Suits' hammers, although—in the games with Ice Flowers and Penguin Suits—they can be frozen by iceballs to temporarily become a floating platform. This fact is used in some cases to hide secrets, such as Star Coins.