I installed directly on my save with pchex++ without any problem, also you have to check if that's the last updated folder, the newest folder have less ilegal Pokémon
Also, the "Eeveelutions and pikachu" event only give me an eevee, it's that normal? The description says "Pokemon: Pikachu and eeveelutions", I think it have to give me a pikachu and the eeveelutions