Well actually, Sunshine isn't my least favorite game in the series. I've never even played it before. Hell I might play it and think that's it's one of the best, but since I don't have it on the Gamecube I can't play it.

I actually don't know what my least favorite core series game is. To be honest it's prob the very first one ^^"
I also haven't played many Zelda/Pokemon games so I can't properly judge them. :/
(Ik I need to play more games rip)