Rotom-Frost @ Choice Scarf
Ability: Levitate
EVs: 252 SpA / 4 SpD / 252 Spe
Timid Nature
IVs: 0 Atk
- Volt Switch
- Blizzard
- Thunderbolt
- Trick / Defog

Rotom-Frost @ Icium Z
Ability: Levitate
EVs: 252 SpA / 4 SpD / 252 Spe
Timid Nature
IVs: 0 Atk
- Blizzard
- Volt Switch
- Thunderbolt
- Defog / Pain Split

Rotom-Frost @ Damp Rock
Ability: Levitate
EVs: 252 SpA / 4 SpD / 252 Spe
Timid Nature
IVs: 0 Atk
- Blizzard
- Volt Switch
- Thunder
- Rain Dance

Additional Move Options: Will-O-Wisp, Substitute
Additional Item Options: Leftovers, Choice Specs, Life Orb, Electrium Z, Mago Berry, Safety Goggles
Overview: Rotom-F is one of two S-rank Pokemon in ZU due to its outstanding offensive capabilities, ability to fit onto a wide range of teams, decent bulk, and perform a variety of roles. Rotom-F's offensive prowess is unmatched because of its Electric/Ice STAB combination, strong power, and good Speed. Rotom-F's STAB attacks in Thunderbolt and Blizzard are only countered by Chinchou and Seaking, two very niche picks in ZU. Moreover, Rotom-F forces teams to run both an Electric check and an Ice check because of how threatening it is. However, Rotom-F poor defensive typing give it minimal opportunities to switch-in. Rotom-F takes 25% upon switching into Stealth Rock and is weak to many common attackers such as Lycanroc and Monferno.
Notes:
Choice Scarf - Choice Scarf Rotom-F is mainly used as a revenge killer and pivot. Rotom-F's nearly unresisted Electric/Ice STAB combination means it forces a ton of 50/50's, which make it prediction reliant due to Choice Scarf. Moreover, being locked into Blizzard is not ideal due to its 70% accuracy. Lastly, Trick, in tandem with Choice Scarf, allows Rotom-F to cripple more defensive switch-ins such as Lickilicky.
Icium Z - Icium Z gives Rotom-F the ability to circumvent Blizzard's poor accuracy for a one time nuke in Subzero Slammer. Icium Z also gives Rotom-F more flexibility when attacking, which makes it less prediction reliant. Defog and Pain Split provide good utility for both Rotom-F and its teammates. Defog gives Rotom-F the ability to remove hazards as it already forces out the majority of hazard setters. Meanwhile, Pain Split increases Rotom-F's longevity and is a semi-reliable form of recovery.
Damp Rock - Rain Dance Rotom-F is a necessity on rain teams as it provides a tremendous amount of support to rain sweepers. Thunder never misses under rain, which gives Rotom-F a powerful and spammable Electric-type STAB attack. Moreover, Volt Switch and Blizzard allow Rotom-F to both bring in rain sweepers and break down their checks respectively.