Alright, let's try this again with some actual examples:
Mimikyu @ Red Card
Ability: Disguise
EVs: 252 HP / 4 Def / 252 Spe
Jolly Nature
- Destiny Bond
- Substitute
- Will-O-Wisp / Toxic
- Thief
Red Card combined with Disguise means that, getting hit by Thief / Knock Off notwithstanding, you...