I'm just informing new effects that were added (the old effects are still working, but now we have new effects) to old abilities in Gen 8.
Disguise: when the disguise is busted, Mimikyu loses 1/8 of its total HP. Flash Fire: if you have a Pokémon with this ability in the FIRST place of your team, you will have a 50% of chances to find Fire-type wild Pokémon. Lighting Rod: same like Flash Fire, but with Electric-type wild Pokémon. Harvest: same like Flash Fire, but with Grass-type wild Pokémon. Storm Drain: same like Flash Fire, but with Water-type wild Pokémon. Inner Focus: Pokémon with this ability can't be affected by Intimidate. Oblivious: same like Inner Focus. Own Tempo: same like Inner Focus. Scrappy: same like Inner Focus. Rattled: if the Pokémon with this ability is affected by Intimidate, its Speed will be boosted in 1 level (Intimidate will low the Attack anyways, remember, this is just an ADDED effect). Moody: Accuracy and Evasion won't be affected with the effects of this ability. Super Luck: if you have a Pokémon with this ability in the FIRST place of your team, wild Pokémon will have an item (with a 50% of chances). Synchronize: if you have a Pokémon with this ability in the FIRST place of your team, wild Pokémon will always have the same nature of the Pokémon with Synchronize (not a 50% like before).
Changes were informed here: https://www.youtube.com/watch?v=-kPnxYiqRpY
He's not an official youtuber of Nintendo, but he always is informing things that are true. (He informed changes in 7th Gen and 6th Gen before too, and he wasn't wrong).
As we can read, Intimidate was nerfed a lot. F.
EDIT: By the way, if someone could share scripts with this changes, would be great. Thanks.