Xurkitree

Of RU's three best Electric-types, Xurkitree, Raikou, and Toxtricity, Xurkitree is commonly considered the most restrictive and consistently dangerous for one simple reason: Grass-type coverage. Its Heavy-Duty Boots set singlehandedly makes Gastrodon, a strong Raikou answer, insufficient for covering the metagame's Electric-types, and other Ground-types like Steelix and Flygon shaky at best. With Ground-types so hesitant to face Xurkitree, it's free to use Volt Switch on switch-ins like Grass-types and special walls, which are rife with weaknesses for teammates to exploit. It's at its strongest against bulkier cores, which often use slower, exploitable Pokemon like Togekiss and Water-types and which struggle to pressure it with passive damage thanks to its Heavy-Duty Boots. While its Speed and bulk aren't great against offensive teams, it can usually find at least one opportunity to threaten them as well, either by forcing a switch or taking a hit. Should its team call for it, it can use Choice Scarf for greater use against offense and potentially cleaning up with Beast Boost at the expense of threatening defensive cores. What generally holds Xurkitree back is its aforementioned bulk and Speed; it can't switch into many direct attacks, and it often has very little breathing room against offense, areas where Raikou beats it out. Its Choice Scarf set suffers from prediction reliance against Ground-types and failing to outspeed other Choice Scarf users like Heracross and Flygon, limiting its ability to revenge kill and clean up. If you're looking for raw attacking power, you might prefer Toxtricity, whose Boomburst is easier to spam and much stronger than any of Xurkitree's individual attacks.