As in you considering X franchise one of your favorites/your favorite but wish one or more entries would disappear and erase the blemish caused by their existence to an otherwise kickass series of games.

Easy, metroid other m.

I wasn't too fond of Black and White for the Pokemon series

-Metroid Other M (metroid prime hunters also)
-Zelda Skyward Sword, Zelda Spirit Tracks
-Mario 3D World

Final fantasy 13, assassin's creed 3, uncharted 3 ( a lot of game with a 3 inside), zelda skyward sword.
Maybe if i play them today i would eventualy like uncharted 3 and zelda

Metroid Other M

Zelda Wind Waker/Majora's Mask

Mario Sunshine

Mario Kart Double Dash

Halo 3

Call of Duty Advanced Warfare, Call of Duty Ghosts, Halo Spartan Strike and Assault.

- Pokémon Diamond and Pearl
- Super Mario 3D World
- Pikmin 3
-Donkey Kong Country 3 and DKC Tropical Freeze

AC 3 is probably the worst offender here. Loved all games until that one. Black Flag and Rogue after that were pretty good though.

Also FFVI.

Any and all Resident Evils after RE0. Capcom should have released RE4 as the new IP it SHOULD have been and kept making Resident games. If they died out because gamers moved on, so be it. I'd rather something die with dignity than sell out and become a joke.