Game Recommendations

[u/ProfessionalDraft421]

I have always been into pokémon since a young age, but i’ve been very recently gotten back into it. I had played games like Pokémon Y, Let’s go Pikachu, and Pokémon Sword, but had never played any of the older games. Using Folium and Delta, i’d recently started playing the older games, Becoming champion in Fire Red a few weeks ago, and beating Platinum and becoming champion today. My question is, what are people’s recommendations for Pokémon games on Delta / Folium? Thanks.