My number one slot for favorite pokemon is Koraidon and Meowscarada, I love these two so much. Their designs are awesome 10/10 for me, and I had a lot of fun having them on my team in SV.
Tbh I love that you get to bond with Koraidon during your whole journey in Paldea, and I love how it behaves like a giant lizard dog lol. For meowscarada I just love the entire line, also yk I love cats they are my babies. Meowscarada is just a good mixture of cute and cool. The personalities of these two is just awesome and fun. I hope i'll see them again in future games. I saw recently Sprigatito was shown in Pokopia and theres Raikou which means some legends are in the game so I have a lil hope for Koriadon.

(sorry for the lil rambling but omg I cannot wait for Pokopia, im so excited for when it comes out. It looks so fun and I am constantly thinking about it. If I dont post any art when the game releases you'll know why lol. Idk I just need a good pokemon game to play after being pretty dissapointed with the DLC for ZA.)