I've got a ton of ways to do this.
>Regular Venusaur now gets Aroma Veil (doesn't replace Chlorophyll)
>Regular Charizard now gets Intimidate (doesn't replace Solar Power), as does regular Beedrill (doesn't replace Sniper or Swarm)
>Regular Blastoise now gets Bulletproof (doesn't replace Rain Dish)
>Water/Steel Mega Blastoise; Mega Launcher now boosts Flash Cannon
>Pidgeot now gets Hyper Voice/Nature Power and Focus Blast
>Normal/Dark Raticate with Strong Jaw, all the Fang moves, and boosted stats; Strong Jaw now boosts Hyper Fang
>Poison/Dark Arbok with boosted stats
>Electric/Fairy Pixilate Raichu, Pikachu gets an Extreme Speed+Volt Tackle+Cross Chop event, and cosplay Pikachu's moves are now egg moves (choose between Icicle Crash+Fake Out and E-Speed+Fighting coverage)
>Gale Wings Golbat, but not Crobat (gives the NFE a niche)
>Protean Tentacruel and Jellicent
>Fire/Fairy Rapidash with Reckless (over Run Away), boosted stats, and a new Fairy-type Double-Edge clone called Lunar Bash (other Fairies also get it, but Mawile doesn't)
>Fighting/Flying Huge Power Farfetch'd (replaces Keen Eye) with Close Combat
>Poison/Dark Water Absorb Muk (replaces Stench) with boosted stats to hard counter Greninja
>Psychic/Dark No Guard Hypno with boosted stats
>Ground/Ghost Marowak with a nerfed Parental Bond (first hit does 80%, second does 40%) and slightly buffed stats; Thick Club doesn't exist anymore
>All Eeveelutions get an -ate Ability for their type
>Unaware Snorlax
>Snow Warning Articuno, Drizzle Zapdos, and Drought Moltres
>Either Psychic/Fairy Mew or Protean Mew
>Grass/Fairy Regenerator Meganium (new, released HA)
>Fire/Ground Typhlosion with a Ground-type -ate (new, released HA)
>Water/Dark Tough Claws Feraligatr (new, released HA)
>Bug/Fighting Ledian with a Bug-type -ate, a Fighting-type -ate, and highly buffed stats
>Bug/Dark Ariados with a Bug-type -ate, a Dark-type -ate, and highly buffed stats
>Pixilate Togetic, but not Togekiss (give the NFE a niche)
More later.