Top 3:

• Primarina
• Raichu (Alolan)
• Ceruledge - Mostly because of Amethio's Ceruledge but I think the design is cool as hell in general

In Dex order because I'm lazy:

• Xatu
• Mareep
• Azumarill
• Umbreon
• Suicune
• Roselia
• Wailord
• Altaria
• Jirachi
• Empoleon
• Glaceon
• Audino
• Lilligant
• Aurorus
• Sylveon
• Lurantis
• Stufful
• Palossand
• Mimikyu
• Cosmog
• Wooloo
• Polteageist
• Hatterene
• Maushold
• Sinistcha
• Ogerpon
• Terapagos