In A Hero's Tail, Spyro's electricity breath powers up machines that are used to help him move across large gaps or raise up to large heights. The electricity powers are also slightly more powerful than the fire breath but the electricity powers take longer to defeat enemies than the fire breath. Electric Breath can be also used to defeat certain types of robots such as Haywire Robots in Dark Mine.
The water dragon, Zap, wears a special harness that allows him to store electricity. He can then discharge it as a breath attack, which can be used on its own or to electrify the slime trails he can make.
Cynder, an Undead dragon, is another Skylander who can breathe electricity.
Wham-Shell, another water character, can manipulate electricity using his mace.
The Air Skylander, Lightning Rod, can summon electrical discharges from the cloud he is in and also bring down bolts of lightning to strike down from above.
Whirlwind can summon tempest clouds, which discharge electricity when foes touch them.
Gallery
Zap using his electrical discharges
Cynder using her Spectral Lightning in the Skylanders series