I see a lot of boosting moves as abilities, so I theory crafted something to be a potential reverser
Deoxys-Speed @ Choice Specs
Ability: Psych Up
Tera Type: Ghost
EVs: 4 HP / 252 SpA / 252 Spe
Timid Nature
IVs: 0 Atk
- Stored Power
- Focus Blast
- Dark Pulse
- Shadow Ball...