Lil Sparky

Li'l Sparkies are small sparks that travel along platforms, first appearing in Super Mario World.

Super Mario World
They have the same immunities as Boos (i.e. invincible to almost everything). Additionally, Big Sparkies (usually referred to as as Hotheads) could be found in Bowser's Castle.

Paper Mario
In Paper Mario, a Li'l Sparky named Watt was imprisoned and tortured by the Big Lantern Ghost. After Mario defeats the Lantern Ghost, Watt joins Mario's party, making her the first playable Li'l Sparky. Other members of her species may be contained in the lamps of the Lantern Ghost.

Super Mario Bros. 3: Super Mario Advance 4
A Li'l Sparky is found in the E-Reader stage "Swinging Bars of Doom" in Super Mario Bros. 3: Super Mario Advance 4.

Super Princess Peach
They return once again in the game Super Princess Peach, appearing in Shriek Mansion and Bowser's Villa, and are invincible to everything Peach can do.

Possible relatives

 * Sparks
 * Hotheads
 * Sparkys

Notable Li'l Sparkies

 * Watt – Paper Mario
 * Watt's Mother – Paper Mario (Mentioned)